Police in Oshkosh, WI, reportedly went through a neighborhood in mid-July, searching houses under “consent searches” and seizing several firearms in their attempt to track down the gunman who shot a cop in the arm July 17.

John Jorgensen, an assistant district attorney for Winnebago County, told Gun Week that the bullet went through the officer’s arm, and that it was apparently fired from a rifle.

According to The Oshkosh Northwestern, no bullet was immediately recovered despite an extensive search of the area where the officer was shot. Officer Nate Gallagher was standing outside his patrol car the night of the shooting, speaking to another officer. No suspect has been identified, but police did question a couple who own the property from where the bullet was believed to have been fired.

They didn’t find a gun, but their visit yielded two felony drug charges, the newspaper said. Jorgensen confirmed that charges have been filed against a couple identified as Mark and Kimberly Jungwirth. Some of the firearms seized by police were taken from their home and a car parked out front. He could not immediately confirm whether firearms were taken from other homes that were searched without warrant, but if they were, he suspected they had been returned.

Wisconsin gun rights activists did not take kindly to the reported seizures. Corey Graff, executive director of Wisconsin Gun Owners Inc. called it “a blatant case of guilty-until-proven-innocent and an abuse of police power.”

“We want the perpetrator of this crime caught and brought to justice just like everyone else,” Graff said in a prepared statement. “But that doesn’t mean the police should trample citizens’ Fourth Amendment protections, steal lawful private property and enter the home without reasonable suspicion or warrant.”

Oshkosh Police Capt. Jay Puestohl told Gun Week that officers involved in the investigation had no intention of violating anyone’s rights. He would not discuss whether any firearms were seized from homes during the investigation.