EAST WENATCHEE — A Cashmere councilman is charged with felony stalking after he allegedly used a tracking device to follow his estranged wife.

Derrick W. Pratt, 48, arrived at an East Wenatchee home around 6:20 p.m. May 29 and began looking through windows, according to a probable cause affidavit filed Friday in Douglas County Superior Court.

Police were called to the home because occupants believe Pratt was in violation of a protection order. He was not, the affidavit said.

Pratt told police he was trying to confirm his wife was inside. He and his wife began divorce proceedings in February, according to Chelan County court records. He was armed with a Kimber 9mm pistol when contacted by police outside the home, the affidavit said.

After he left, the homeowner found a tracking device attached to Pratt’s wife’s car, the affidavit said. The homeowner recounted to police a conversation with Pratt a few months earlier in which Pratt showed him information on his phone showing he was tracking his wife.

Later that night, Pratt allegedly sent his wife and the homeowner vulgar text messages, and then texted threatening messages to the homeowner, the affidavit said.

Pratt was ordered by police to stay away from the home for 30 days and was ordered by Douglas County Superior Court to have no contact with his wife.

He was arrested Saturday on suspicion of stalking and then released from Chelan County Regional Justice Center after posting $100,000 bond. He was also ordered to surrender all firearms in his possession.

The Douglas County Prosecutor’s Office formally charged Pratt with felony stalking Tuesday afternoon.

Pratt is running for re-election to the Cashmere City Council. He is unopposed.