She Gives Love a Bad Name by Kirsten S. Blacketer

Welcome to 1985

Quinn Murphy
I can’t believe I got caught! After ten years, you’d think I would have honed my skills as a thief. Unfortunately, I got sloppy and picked the wrong house. Instead of calling the cops, they call in a favor…with a brooding, cranky homicide detective. He offers me a choice I can’t refuse if I want to keep my freedom.

Detective Grant Richards
I’m too old for this shit. I should’ve told Rob to get lost when he called me about the kid he caught red-handed breaking in. I let her go, under one condition. Become my informant. I might as well sign her death certificate myself.
I can’t turn her away when she stumbles back into my life, terrified and bloody, especially if she’s a murder witness. Now we’re stuck together, and she’s driving me insane. I may kill her before the murderer does. How the hell do I stop a serial killer and keep her safe without crossing the line?