TJOFLAT, Circuit Judge:

In this case, police officers entered a residence without a warrant. The owner of the residence told them to leave, but they refused. When the officers detained the owner, he punched one of them. He was arrested for assaulting a police officer and taken into custody.

The owner, claiming that the officers' conduct in entering his house without a warrant and then arresting him for punching the officer infringed his rights under the Fourth Amendment,1 sued the officers in the United States District Court for the Northern District of Alabama, seeking damages under 42 U.S.C. § 1983.2 The officers responded by moving the District Court to dismiss the owner's claims based on the affirmative defense of qualified immunity. The court denied their motions, and they appeal.3 We conclude that the District Court properly denied the officers qualified immunity for entering the owner's residence without a warrant. The court erred, though, in denying the officers' motions to dismiss the owner's claim for unlawful arrest.

I.

The home owner is Jerry Morris. The police officers are Mark Bowers and Lee Bradford. The claims at issue here arose out of events that took place in the early morning of April 19, 2009, at and around Morris's residence.

According to Morris's complaint,4 a 911 operator in Alabama received an emergency phone call from a highly intoxicated woman, who said that she had been "abandoned"5 and did not know where she was. She requested that someone be sent to pick her up.6

Town of Lexington Police Officer Lee Bradford and Reserve Police Officers Matt Wigginton and Jan Montgomery and Town of Anderson Police Chief Mark Bowers responded to the 911 call7 and on arriving at Morris's address found the woman who made the 911 call standing outside his house. She claimed "vaguely and generally" that she was in danger and that someone had been beating Morris's horses.8 The woman made no accusations against Morris.

After placing the woman in a chair on the porch in front of Morris's house, the officers knocked on the front door. Morris was in the house, asleep. His girlfriend woke him, and he went to the front door. While Morris stood inside the threshold, the officers asked him about the woman sitting in the chair. He said that he was unacquainted with her but knew her sister.

When the officers told Morris that the woman said his horses were being abused, he expressed concern and informed the officers that he would put on his boots and check on them. Bradford immediately informed him he was "not going anywhere."9 When Morris stepped away toward the interior of the house, Bradford, Wigginton, and Bowers entered the house and followed him. Morris told them to leave — that if they wanted to search the house, they would have to obtain a warrant. Bowers and Wigginton left and stood on the front porch. Bradford stood in the front doorway, holding the door open.

At this point, Lauderdale County Deputy Sheriffs James Distefano and Patrick Davis arrived on the scene and were briefed on what had taken place — that Bradford, Wigginton, and Bowers had entered Morris's house without a warrant, and that Wigginton and Bowers had stepped back outside when Morris told them to leave. Bradford had refused to leave; he remained in the doorway. When Morris tried to close the door, Bradford shoved him. Morris, retaliating, punched him. With that, Bradford, Bowers, Wigginton, Distefano, and Davis entered the house, brought Morris to the floor and subdued him. While Morris was on the floor, Bowers used a taser on him in "drive stun mode, leaving numerous burn marks on [his] back."10 Bowers used the taser after Morris was handcuffed and no longer resisting. With Morris in custody, Bowers, Bradford, Wigginton, and Montgomery searched his home and cars.

Morris was charged with assaulting a police officer and resisting arrest. In September 2009, the Lauderdale County District Attorney presented the charges to a grand jury. The grand jury issued a no bill. The next month, Morris filed notices of claims with the Towns of Lexington and Anderson. After Morris filed the notices, Bowers, Bradford, Wigginton, and Montgomery met and agreed to a false version of the events that had taken place at Morris's house. Their story was that they entered the house with Morris's consent; that Morris was intoxicated, aggressive, and threatening; that Morris slammed the door on Bradford without giving him a chance to leave; that Bradford did not shove Morris; and that Morris punched Bradford without provocation. Having conjured this story, the four officers convinced the District Attorney to resubmit the case to another grand jury.

On November 6, 2009, a second grand jury returned an indictment against Morris, charging him with two counts of assault in the second degree and a single count of resisting arrest. The case was tried to a jury the next month. The jury deadlocked on all counts, and the court declared a mistrial. A second trial, in January 2011, resulted in verdicts of acquittal.

II.

Morris brought this law suit in the Northern District of Alabama on March 28, 2011. Named as defendants in addition to Bowers and Bradford were Officers Wigginton and Montgomery, Deputies Distefano and Davis, the Town of Lexington, and the Town of Anderson.11 The complaint is framed in thirteen counts. Counts I through VI are brought under 42 U.S.C. § 1983 and allege federal constitutional violations.12 Counts VII through XIII are brought under state law and allege that the facts underpinning the federal constitutional violations also constituted tort-law infringements.13 All counts sought compensatory and punitive damages.

The defendants separately moved the District Court to dismiss all or part of the federal and state-law counts for failure to state a claim for relief. See Fed.R.Civ.P. 12(b)(6). The motions of the individual defendants also sought the dismissal of the federal counts under the doctrine of qualified immunity. The District Court issued a plethora of rulings on these motions. The only rulings before us in this appeal are the court's denial of Bradford's and Bowers's motions to dismiss four of the federal counts, Counts I, II, IV, and V. Only Count I, based on the officers' warrantless entry into Morris's house, and Count II, based on Morris's arrest, require extended discussion.14

III.

"The doctrine of qualified immunity protects government officials `from liability for civil damages insofar as their conduct does not violate clearly established statutory or constitutional rights of which a reasonable person would have known.'" Pearson v. Callahan, 555 U.S. 223, 231, 129 S.Ct. 808, 815, 172 L.Ed.2d 565 (2009) (quoting Harlow v. Fitzgerald, 457 U.S. 800, 818, 102 S.Ct. 2727, 2738, 73 L.Ed.2d 396 (1982)).15 As the Supreme Court has explained, "the driving force" behind qualified-immunity doctrine is to ensure that "`insubstantial claims' against government officials be resolved prior to discovery and on summary judgment if possible." Anderson v. Creighton, 483 U.S. 635, 640 n. 2, 107 S.Ct. 3034, 3039 n. 2, 97 L.Ed.2d 523 (1987).

To that end, to survive a motion to dismiss, Morris must satisfy the two-pronged qualified-immunity standard: (1) the facts alleged in his complaint constitute a violation of his constitutional rights, and (2) the constitutional rights were "clearly established" when the defendant committed the act complained of. Pearson, 555 U.S. at 232, 129 S.Ct. at 815-16. A qualified-immunity inquiry can begin with either prong; neither is antecedent to the other. Id. at 236, 129 S.Ct. at 818.

"The relevant, dispositive inquiry in determining whether a right is clearly established is whether it would be clear to a reasonable [police officer] that his conduct was unlawful in the situation he confronted." Loftus v. Clark-Moore, 690 F.3d 1200, 1204 (11th Cir.2012) (internal quotation marks omitted). While Morris need not demonstrate that there is case-law specifically addressing his factual scenario, "existing precedent must have placed the statutory or constitutional question beyond debate." Ashcroft v. al-Kidd, ___ U.S. ___, ___, 131 S.Ct. 2074, 2083, 179 L.Ed.2d 1149 (2011).

To demonstrate that the contours of a right are clearly established, Morris may proceed in one of three ways:

Terrell v. Smith, 668 F.3d 1244, 1255 (11th Cir.2012) (some alterations in original) (citations omitted).

With these principles in mind, we turn to Bowers's and Bradford's appeals. They argue that the District Court erred in failing to dismiss Counts I and II. We address each count in turn.

A.

The Fourth Amendment provides, in relevant part, that the "right of the people to be secure in their persons, houses, papers, and effects, against unreasonable searches and seizures, shall not be violated." U.S. Const. amend. IV. "[T]he `physical entry of the home is the chief evil against which the wording of the Fourth Amendment is directed.'" Payton v. New York, 445 U.S. 573, 585, 100 S.Ct. 1371, 1379, 63 L.Ed.2d 639 (1980) (quoting United States v. U.S. Dist. Court, 407 U.S. 297, 313, 92 S.Ct. 2125, 2134, 32 L.Ed.2d 752 (1972)). As such, if there is one principle that is firmly established in Fourth Amendment jurisprudence, it is that "searches and seizures inside a home without a warrant are presumptively unreasonable." Brigham City v. Stuart, 547 U.S. 398, 403, 126 S.Ct. 1943, 1947, 164 L.Ed.2d 650 (2006) (internal quotation marks omitted). "[W]hen it comes to the Fourth Amendment, the home is first among equals." Florida v. Jardines, ___ U.S. ___, ___, 133 S.Ct. 1409, 1414, 185 L.Ed.2d 495 (2013).

Bradford and Bowers seek to overcome the presumption that their warrantless entry into the Morris residence was unreasonable with the argument that a warrant was not required at all; they had "reasonable suspicion" to detain Morris and, thus, to enter his house to do so.16 If not, the entry was not proscribed by clearly established law. We are not persuaded. Assuming for sake of argument that reasonable suspicion akin to that appearing in Terry v. Ohio would provide an exception to the Fourth Amendment's warrant requirement,17 the officers lacked reasonable suspicion, or even arguable reasonable suspicion. As such, the officers' entry into the Morris residence, without a warrant, exigency, or reasonable suspicion, was contrary to clearly established Fourth Amendment law.

According to the complaint, a total of four officers of the Lexington and Anderson police departments arrived at Morris's residence early in the morning of April 19, 2009, in response to a 911 call and found an intoxicated woman, who said she been abandoned and did not know where she was. She claimed "vaguely and generally" that she was in danger and that someone had been beating Morris's horses. The officers placed her in a chair on the front porch of Morris's house and knocked on the front door. They wanted to ask him some questions. At this point, the officers were perfectly within the bounds of the law; "a police officer not armed with a warrant may approach a home and knock." Jardines, ___ U.S. at ___, 133 S.Ct. at 1416. "Officers are allowed to knock on a residence's door or otherwise approach the residence seeking to speak to the inhabitants just a[s] any private citizen may." United States v. Taylor, 458 F.3d 1201, 1204 (11th Cir.2006) (alteration removed) (internal quotation marks omitted). So far, so good.

Bradford and Bowers say they had reasonable suspicion to detain Morris, to make a Terry stop. Reasonable suspicion of what? And precisely when did they have it? They do not say. They did not have reasonable suspicion of anything concerning Morris when they approached the front door of his house and knocked, for the woman had said nothing at all indicating that Morris had done anything wrong. So, the officers' reasonable suspicion had to have arisen after Morris opened the door.

And what did the officers see when Morris opened the door? A man who had been sleeping, who had just awakened and had not put on his shoes and was unarmed. When the officers informed him that the woman sitting on the porch had told them that someone was beating his horses, his reaction was to put on his boots and check on his horses. What the officers faced was an unarmed man who had just gotten out of bed and was concerned about the safety of his horses. He was not a man armed and presently dangerous, or a man who "ha[d] engaged in, or is about to engage in, criminal activity," United States v. White, 593 F.3d 1199, 1202 (11th Cir.2010) (internal quotation marks omitted), and thus was not subject to a Terry stop.

In short, the officers entered Morris's house without a warrant or anything remotely approaching reasonable suspicion. Therefore, they violated the Fourth Amendment. The District Court properly declined to dismiss Count I under the doctrine of qualified immunity.

B.

"An arrest without a warrant and lacking probable cause violates the Constitution and can underpin a § 1983 claim, but the existence of probable cause at the time of arrest is an absolute bar to a subsequent constitutional challenge to the arrest." Brown v. City of Huntsville, 608 F.3d 724, 734 (11th Cir.2010). The probable cause standard "is met when the facts and circumstances within the officer's knowledge... would cause a prudent person to believe, under the circumstances shown, that the suspect has committed, is committing, or is about to commit an offense." Durruthy v. Pastor, 351 F.3d 1080, 1088 (11th Cir.2003) (internal quotation mark omitted). For an officer to be entitled to qualified immunity, however, he need not have actual probable cause; "arguable" probable cause will suffice. Brown, 608 F.3d at 734. Thus, so long as "reasonable officers in the same circumstances and possessing the same knowledge as the Defendants could have believed that probable cause existed to arrest Plaintiff," that is enough. Kingsland v. City of Miami, 382 F.3d 1220, 1232 (11th Cir.2004) (internal quotation marks omitted). "Whether an arresting officer possesses probable cause or arguable probable cause naturally depends on the elements of the alleged crime and the operative fact pattern." Skop v. City of Atlanta, 485 F.3d 1130, 1137-38 (11th Cir.2007) (citation omitted).

Under Alabama law, it is a crime to resist a lawful arrest, see Ala.Code § 13A-10-41, and to commit assault, see id. §§ 13A-6-20 to -22. Nevertheless, Alabama law gives a citizen the right to use force to resist an unlawful arrest. See Commentary to Ala.Code § 13A-10-41 (quoting cases).18 In addition, a person "in lawful possession or control of premises... may use physical force upon another person when and to the extent that he reasonably believes it necessary to prevent or terminate what he reasonably believes to be the commission or attempted commission of a criminal trespass by the other person in or upon such premises." Ala. Code § 13A-3-25(a). Also, Alabama law permits a person to use reasonable force to defend himself from what he "reasonably believes to be the use or imminent use of unlawful physical force." Id. § 13A-3-23(a).

The officers' entry and presence in Morris's house was unlawful, and Morris was within his right to demand that they leave. Cf. Kentucky v. King, ___ U.S. ___, ___, 131 S.Ct. 1849, 1862, 179 L.Ed.2d 865 (2011) ("[E]ven if an occupant chooses to open the door and speak with the officers, the occupant need not allow the officers to enter the premises...."). When Bradford stood in the doorway and refused to leave when asked to leave, he effectively detained Morris. And Bowers, who was standing close to Bradford, assisted the detention. Under Fourth Amendment, the detention amounted to an unlawful seizure.

Morris's reacted to this detention by trying to shut the door. Bradford reacted to Morris's move by pushing him and thus committing an assault. Morris retaliated by punching Bradford, by assaulting him. Although Alabama law permits a citizen to use reasonable force in defense of self or property, Ala.Code §§ 13A-3-23, -25, this is an affirmative defense, id. § 13A-3-21. Morris could plead the use of such force as a defense to a charge of assault; in fact, he prevailed when he was tried on that charge. But the fact remains that once Morris punched Bradford, the officers had probable cause, or at the very least arguable probable cause, to believe that Morris had committed an assault.

Therefore, the officers' arrest of Morris after he punched Bradford cannot be considered a violation of Morris's Fourth Amendment right not to be seized without probable cause. Morris has accordingly failed, in Count II, to state a claim that his arrest constituted a Fourth Amendment violation, and the District Court erred in denying Bower's and Bradford's motions to dismiss that count.

IV.

For the foregoing reasons, the District Court's decision ruling with respect to Count I is AFFIRMED; it ruling as to Count II is REVERSED.

SO ORDERED.