Miami police have released new footage of Derek Medina, the "Facebook killer" who allegedly murdered his wife before posting a confession and photo of her body to the site.

Medina, 31, left a long trail online, including e-books about hunting ghosts and a weird YouTube channel. In a video posted two days before he told police he'd gunned down his wife, he roundhouse-kicks a bag while wearing a suit:

But in what might be the final footage of him as a free man, the Miami-Dade Police Department released one more video Friday. Pulled from a station surveillance camera, Medina, accompanied by another man, strolls into the police station, walks up to the counter, then sits down. Police excised five seconds of footage.

His casual manner reflects the remorseless tone in his Facebook confession, posted just hours before:

Im going to prison or death sentence for killing my wife love you guys miss you guys takecare Facebook people you will see me in the news

Police say Medina's wife, Jennifer Alfonso, 26, was found deceased from gunshot wounds. Their daughter, who's 10, was unharmed.

Photo via YouTube