Diagnosis Murder/Murder by Friendly Fire
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Murder by Friendly Fire is the first episode of the fourth season of Diagnosis Murder, and the sixtieth episode overall.
Special Guest Star: Kim Johnston Ulrich (Janine Vogel)
and Jonathan Banks (Max Jupe)
Featuring: Vance Bjorklund (LAPD Honor Guard Leader)
A fellow cop is gunned down, but what Steve doesn't realize is that his partner, who's having an affair with the dead man's wife, is the killer.