Man claims self-defense in fatal stabbing, warrant shows. But police doubt his story.

A man was charged Saturday with murder after police alleged that he used a kitchen knife to stab another man to death inside a southeast Fort Worth apartment.

Aaron Dennison, 47, told detectives that the victim had been choking him and he was defending himself in the killing Friday night, according to an arrest warrant affidavit. Police wrote in the document of discrepancies between his story and a witness account and the location of blood on the floor.

Alonzo Lee Jr., 48, of Fort Worth, was stabbed in his chest and abdomen, the Tarrant County Medical Examiner’s Office said.

Lee was slain about 7 p.m. inside Dennison’s apartment in the 5200 block of Ivywood Lane, police said. When an officer arrived, Dennison told him from a balcony that the victim was inside.

Dennison later told detectives that he and Lee had been between the living room and kitchen when Lee grabbed him from behind with both arms and choked him. Lee, Dennison said, had been smoking crack and was in an aggressive mood, according to the affidavit.

Dennison told the detectives that he grabbed a knife from the kitchen counter and stabbed Lee once in the abdomen near the kitchen, eventually dragging him toward the bedroom as Lee’s arms remained around his neck, according to the affidavit.

“Dennison said he believed he stabbed the victim three times before he fell to the floor in the bedroom. Dennison said he then kicked the victim and expressed anger for making him have to do that,” a detective wrote.

When the first officer arrived, he saw Lee on a bedroom floor. He was on his back. Large amounts of blood were on his body and the floor and bed, according to the affidavit.

Police suggested that blood evidence cast doubt on Dennison’s story. There was no obvious blood in the living room or kitchen, where Dennison had described stabbing Lee. All of the blood was isolated to a bedroom, a detective wrote in the affidavit.

Also, an officer reported that when he arrived, Dennison had been urging his roommate to tell police that Lee had grabbed him, the affidavit states.

Beyond the blood, there was a witness.

Police interviewed a man who had been inside the apartment with Dennison, Lee and a woman and, according to the affidavit, said he saw Dennison stab Lee. The man, whose name was redacted in the affidavit, said he had been drinking on a balcony when Dennison wanted him to engage in “some sort of activity” with the woman in the bedroom.

When the man declined, Dennison became angry, the affidavit states. Lee tried to calm the situation, the man told police.

A detective wrote that the man said he watched as Dennison grabbed two knives from the kitchen and went toward the bedroom, where he stabbed Lee.

The man said he grabbed Dennison’s hands and tried to secure them as the woman was on the assailant’s back, the affidavit states.

An officer said he saw two large kitchen knives in the sink, with a small amount of blood visible on the blade of one of them, according to the affidavit. The knives had water on them, the affidavit states, as if they had been washed.

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