The FBI called Muskegon County dispatchers to warn them of the possibility of an upcoming bank robbery 16 minutes before two suspects held up a Ravenna bank, according to

.

After the robbery, FBI agents said they happened to be in the area, but dispatch tapes showed they had been tracking the suspects via GPS.

The suspects were believed to have been involved in other bank robberies, and FBI agents followed them to Ravenna.

Suspects Derryl LaFave and Kristopher Cheyne

on I-96 before they ran down and killed Walker Police Officer Trevor Slot. They fired on police and were fatally shot, one by a Muskegon County Sheriff's deputy.