A jury found a Florida man guilty of second-degree murder after he killed his wife and posted a photo of her blood-spattered body on Facebook.

Jurors on Wednesday rejected the argument that Derek Medina, 33, acted in self-defence when he shot 27-year-old Jennifer Alfonso eight times in August 2013 at their Miami residence, according to a court spokeswoman.

"No family should ever have to see their daughter killed and then exhibited worldwide on the internet like some macabre trophy to a husband's anger as was Jennifer Alfonso," State Attorney Katherine Fernandez Rundle said in a statement.

Prosecutors argued he killed her after an argument in which she threatened to leave him.

The maximum prison sentence would be sought for Medina, who faces 25 years to life in prison at a sentencing hearing scheduled for January, prosecutors said.

Medina wrote on Facebook shortly before turning himself in: "I'm going to prison or death sentence for killing my wife."

"My wife was punching me and I am not going to stand any more with the abuse, so I did what I did," he added in the post.

During the two-and-half week trial, defence attorneys described Alfonso as an abusive spouse.

"She wanted to push Derek - and she pushed him too far," defence attorney Saam Zangeneh said in closing statements.

Medina married Alfonso in 2010. The couple divorced in early 2012, then remarried a few months later.

Source: Agencies