"Sgt. Ed Troyer, Pierce County sheriff's spokesman, said emails Powell sent authorities seemed to confirm the Powell planned the deadly blast. Troyer didn't elaborate on the contents of the emails"
On one of the Utah channels tonight someone from the sheriff's dept. said the emails confirmed Powell's complicity and said something about what to do with his stuff. They hadn't yet confirmed that the emails came from Powell, but he believed they did. I imagine they will be forthcoming.