In addition to the other answers here, the incubation period for prion diseases is quite long. Based on a quick search they seem to take anywhere from five to 40 years to even start showing symptoms. A killer would probably want more immediate results.
I use Plexamp for music, and I can connect the app on my phone to the client on my Roku. Then I can select tracks on my phone and they'll play on the Roku.
I did do the nasty in the pasty.