the laptop is possessed

[ladyhatshepsut.livejournal.com]

Greetings, all

I'm trying to find an NCIS crossover where it turns out the marine/soldier/whatever-he-was was actually killed by his computer.  His laptop is haunted or possessed and continues to cause trouble when it's brought to Abby's lab, hacking itself into her system, adding files that weren't there and deleting others.  Abby and McGee somehow get ahold of Dean and Sam (or the brothers answer a general cry for help).  There's no way they're coming into the offices, so Abby and McGee follow the salt-and-burn directions over the phone.  Sam gives Abby his phone number and she uses pay phones to keep in touch.  For a while, he's out of touch until Ellen answers his phone and relays Abby's worry.