Derek Medina, 31, told his Facebook friends he was "going to prison or death sentence for killing my wife," adding, "love you guys miss you guys take care Facebook people you will see me in the news."
He went on to justify his actions by claiming that his wife had been punching him.
"I am not going to stand anymore with the abuse so I did what I did I hope you understand me," Medina wrote.
The post was captioned "Rip Jennifer Alfonso."
A 10-year-old girl found at the home was unharmed.
Police said Medina arrived at a South Miami PD station following the incident and turned himself in.
According to his Facebook profile, which has now been removed, Medina was a featured extra in a 2009 episode of USA's Burn Notice.