Prosecutors charge man in Oklahoma County's first homicide of 2013

Nichols became irate and threatened the witness, who pulled into a convenience store about two blocks from the victim's house “to get the suspect out of the vehicle,” according to the affidavit.

Other witnesses told investigators they saw Nichols “covered in blood” when he arrived at their location, police reported.

Nichols told them he “got into a fight with two black males at the victim's house,” an officer wrote in the affidavit.

Witnesses called Nichols “a very violent individual who is bi-polar and was obsessed with how (Flippo) was living her life,” police said.

Nichols and Flippo had two children together but were separated, police said.

Court documents show Flippo had been abused in 2005 by Nichols, and she told police he threatened her in November.