Police are investigating what caused an elderly driver's pickup truck to crash through the wall of a Peoria hair salon, killing a customer inside the shop.

Authorities say 76-year-old Gerald Brown was pulling into the Plaza Hair Salon parking lot on Saturday to pick up his wife from her hair appointment when his truck went out of control.

The vehicle pinned an 83-year-old customer, Ila Aupperle, against the shop's back wall. She was taken to a hospital where she was pronounced dead.