>>>>a simulated device, it would not have gone off by itself
What does that mean? Does simulated mean fake? 'Would not have gone off by itself' leads me to think it could have gone off if set?
Read Training Device but the question is training for who. Not for the TPD EOD, TFD, TPD, Pima Sherrif Dept., D-M EOD, then who?????
or it was some kind of explosives without any detonator.