A man found slain near a creek bed Monday afternoon was a roommate of his suspected killer, who allegedly stabbed him during an argument, according to court documents.

The body of Richard Card, 47, was found covered by a green tarp and wrapped up in bloodied blankets near the west side of Monument Creek, near Garden of the Gods Road, court documents say.

The suspect, 44-year-old Donald Becker, was arrested Tuesday night on suspicion of second degree murder.

Investigators believe Card was stabbed at the apartment he shared with Becker and Becker's girlfriend at 4650  North Nevada Avenue, just blocks away from where his body was discovered.

When investigators went to the apartment, they met with Becker's girlfriend, who agreed to a interview with detectives.

During the interview, the 57-year-old woman told investigators she'd listened to Card and Becker argue from a bedroom in the apartment on April 17. Shortly after the arguing stopped, she told investigators that Becker came into the bedroom and told her that he'd killed Card, court documents state.

She also told detectives that she'd stepped over Card's body when she left the apartment, and was upset about what happened.

According to court documents, she slept in a homeless camp the night of the alleged killing and when she returned, she asked Becker about the body. He told her not worry about it, court documents say.