This episode is so badly written that it was one of the key reasons we stopped watching the show as it was first airing.
They are so busy showing off their Anti-body profiling gimmick (because whoever wrote this story doesn't understand how DNA actually works), that they ignore several much easier ways to solve the problem. Like test the people for Gun Shot Residue, or just back-trace the shooter from the video surveillance. Oh dear... did I just come up with a gaping plot hole in the writing that any nit-wit should have spotted? Why yes I did.
This episode seemed to be yet another shallow attempt to make Elizabeth Shu's character more interesting.
Review of Split Decisions
