Murder victim Chassity Lester was pregnant with another man's child when Brandon Davis killed her this week, an arrest warrant says.
The warrant, signed by a magistrate judge Wednesday, says Davis was "extremely jealous" of Lester, who was reportedly cheating on him.
The pair have a 3-year-boy together.
The warrant also details why investigators focused on Davis:
He was the last person seen with Lester.
Her body was found around 4 p.m. Tuesday.
But Davis reportedly told several people before that time that Lester was found dead, stabbed and raped.
At that time, the warrant says, nobody but the killer or an accomplice would have known about the death.
Those people said Davis claimed that he'd been notified by the victim's family.
But they were not notified until after 4 p.m. Tuesday, the warrant says.
Davis also made calls from Lester's cell phone after her body was found, the warrant says.