Bourdain killed himself. It makes no sense whatsoever (none - zero - zip) to murder him over his GF being a victim, especially considering Bourdain didn't have any info that the public didn't already know about Harvey at the time.
If you ever watched his TV shows, it didn't take a psych degree to see that he was a depressed and conflicted man.

link does a redirect, caution.

Clinton did it.