Time Killer: A Short Story

Detective Dominic is trying to solve a dozen murders--all with the same MO. The catch is, the murders have happened so close together, it would be impossible for one person to commit them all.
At least, that's what she thought. But everything changes when Dominic finds a time machine in the desk of one of the victims.
Now, Detective Dominic has to chase down a time-hopping serial killer before he commits one more murder, one much closer to home.