I'm quite interested in this.
Male.
A Would-be Ted Bundy, until his second victim knocked him out and called the cops. His whole plan was to gain knowledge on how the police force works, so he could evade the cops if things got rough, and murder as many people as he could, but in secret. He completed step one, after joining the NYPD, but since this had already happened before, they knew what to do. His court case was quickly decided Guilty after his lawyer couldn't provide any evidence that he didn't, other than a crappy excuse to pass by his assault as self-defense, from the bloody nose and bruised face, but the judge wouldn't believe that story. Alas, through all his efforts to become a serial killer, he was sent to jail.

Hopefully it hasn't already been locked to a set amount of people?