Last week, a man carjacked Powell's SUV in Mesa, Arizona, while his nanny and 1-year-old son were sitting in it.
They were in the SUV waiting for Powell's wife, Heidi, to finish a hair appointment. That's when a man threatened to kill them.
The nanny grabbed the baby, got out of the vehicle and went to Heidi Powell for help.
Heidi Powell's iPhone can tell her the whereabouts of her iPad and laptop.
Police put Heidi's love of technology to use, including her OnStar device, and were able to track down the suspect and vehicle.
The suspect was taken into custody, and the Powell's say they are grateful and lucky.
