A man driving around in a Kia Sportage "full of tools stolen from a business" and discussing plans for a future heist with accomplices accidentally pocket-dialled 911 on his phone, allowing the police to listen in and, eventually, arrest him.
The Onondaga County, NY Sheriff's Office were, in fact, already looking for a suspect in the robbery when the mobile phone decided to turn in its owner; the dispatcher, realising what was going on, "relayed the conversation to deputies", and soon a sheriff's deputy pulled over the Sportage. The call was still connected when the deputy asked for licence and registration.
Which means, among other things: Trend alert! Last week, a house called 911 for help; so we're only one more allegedly-accidental-but-actually-quite-helpful emergency services call away from there being a "thing". Also, there is a lesson here - turn off your phone when you are planning a robbery.