MIAMI — A jury began deliberating Tuesday whether a South Florida man is guilty of murder or acted in self-defense when he fatally shot his wife eight times during an argument and then posted a photo of her dead body on Facebook.

The jury got the case of 33-year-old Derek Medina after more than two weeks of testimony, although he did not take the stand himself. Medina did claim in a 28-minute videotaped police statement played in court that he shot 27-year-old Jennifer Alfonso after years of abuse and during an argument in which she assaulted him with a knife.

The jury deliberated about two-and-a-half hours Tuesday but did not reach a verdict. The panel will return Wednesday to continue.

Prosecutor Leah Klein said in a closing argument that Medina coldly shot his wife at close range as she likely was cowering on her knees rather than punching and shoving him as he claimed. Medina had time, Klein said, to think things over after he walked upstairs in their town house to get his gun, and before he returned to the kitchen to fire the fatal bullets.