Warrant issued for man accused of fatally shooting woman while trying to kill ex's new boyfriend

MILWAUKEE (CBS 58) -- A man is on the run after Milwaukee police say he tried to kill a man dating his ex.

Police say Orlando Cain shot and killed a passenger inside the new boyfriend's car. 

The shooting happened in January near 65th and Hampton. 

The ex and her sister were waiting outside for the boyfriend when police say Cain ambushed them. 

Sixty-two-year-old passenger Mary Boulton was shot in the head and died. 

The sister and boyfriend were also shot, but survived their injuries. 

An arrest warrant has been issued for Cain.