If it was a lone suicide then why where TWO devices found? I wouldn't trust anything the authorities in Oklahoma say.
There were not two devices. That was just an early rumor.
I believe there are indications that was a false report. All breaking incidents involve a large number of "facts" that later turn out to be wrong, that were not the result of deliberate lying or a coverup.
The key thing is not to simply pick and choose the facts you want to believe that support the preconceived story you're hoping for. They ALL need to be considered suspect.