Why does Constable Oleska call the State Police for help in the novel, Wolf Hollow?

Constable Oleska is the local law enforcement agent whose job is uneventful apart from an occasional drunk. This changes after Betty comes to town. Oleska does his best to remain objective when Betty blames everything that she has done –including injuring Ruth –on Toby. Oleska ends up calling in the Pennsylvania State Police when Betty goes missing and Toby is believed to be responsible for it.