For a long time, Tom Wachowski's family has been part of the Green Hills Sheriff's Department, a tradition that would continue to this day.
Sonic the Hedgehog
Later, Tom, now a fugitive from the law, called the Green Hills Sheriff's Department while in a gas station to tell them about the events. However, Dr. Robotnik, who was surveying the call at the moment, took control of it and threatened Tom, only for the latter to hang up. Frustrated, the doctor left the department.
The next day, many residents of Green Hills, including the members of the Green Hills Sheriff's Department, supported Sonic and Tom during their battle against Robotnik. After the two sent the doctor to the Mushroom Planet through a Ring, the Green Hills Sheriff's Department returned back to its normal routine, with Tom having changed his mind along the way and chosen to remain as the Sheriff of Green Hills.