Solve a murder? In what sense?

By finding the killers? I doubt that very much.

By identifying the corpse? This alone doesn't quite solve the murder, but only unravels the depth of the incident. Really, to do so, someone has to spill the beans, much less than help discover a thread that cracks the case.

Sounds like what you're really doing is inviting a leak. I don't see what else would work.