Ohio Rev. Code § 4549.05: Removing ignition key left in ignition switch.

A law enforcement officer may remove the ignition key left in the ignition switch of an unlocked and unattended motor vehicle parked on a street or highway. The officer removing said key shall place notification upon the vehicle detailing his name and badge number, the place where said key may be reclaimed, and the procedure for reclaiming said key. The key shall be returned to the owner of the motor vehicle upon presentation of proof of ownership.