Man calls 911 after girlfriend found dead in motel, police allegedly uncover disturbing videos on his phone

A Missouri man called 911 after his girlfriend died at a motel, but investigators say a disturbing discovery soon turned the case into a homicide investigation .

Nicholas Ayres, 35, is now charged with second-degree felony murder and first-degree domestic assault in the death of 37-year-old Destiny Dunn, according to Columbia Police and Boone County jail records.

The investigation began around 3:22 p.m. on Aug.

12, when Ayres called 911 and told a dispatcher that Dunn was lying down, might have a heartbeat and appeared "red and blue," according to a probable cause statement (PCS) reviewed by Fox News Digital.

TEXAS DAD FACES MURDER CHARGE AFTER ESTRANGED WIFE FOUND DEAD AT SUBURBAN HOME: POLICE Ayres told the dispatcher the couple had gotten into an altercation while they were in the shower and claimed Dunn fell after he got out, the court document states.

But as the dispatcher pressed him about Dunn's condition, Ayres allegedly acknowledged they had been fighting and that she was bruised.

"It looks like I f---ing beat her up and I promise to God I didn't do it," Ayres allegedly told the dispatcher, according to the PCS.

The dispatcher then instructed him on performing chest compressions.

Officers arrived about a minute later and found Dunn dead, according to the affidavit.

Investigators described bruising across her body, including severe bruising to her neck and face, as well as swollen and discolored eyelids.

NJ MOM’S MURDER SHROUDED IN SECRECY AS PI SAYS ‘NEVER SEEN ANYTHING LIKE THIS’ BEHIND-CLOSED-DOORS CASE Police quickly began piecing together what allegedly happened inside the motel room.

Neighbors who shared a wall told investigators they had heard what sounded like a physical altercation around 11 a.m. that morning, according to the court filing.

Ayres was taken into custody .

During a post-Miranda interview, he allegedly admitted having physical altercations with Dunn on Aug.