The X-Files is a pretty cheesy and silly show, especially when they leave their alien abduction wheelhouse, and I'm sure they couldn't afford writers with any experience related to what they're writing about... But arresting a teenager because the people he lays hands on die... And actually having a prosecutor be willing to try it... And not have the case dismissed on day one???
That's a little too stupid even for broadcast TV drama. Also Mulder keeps running after a vision for some reason, why does he not understand how visions work?
Anyway if we're in a world where the supernatural is considered supernatural, then how can you bring murder charges when the murder weapon is the power of the Devil working through touch? Why is the legal system of the X-Files not otherwise shown to accept spectral evidence, miracles, super powers, etc.?
What I'm saying is, this whole episode is dumb.