NAUGATUCK, Conn. (WTNH) — Police are investigating at a local business in Naugatuck after they say complaints of possible animal cruelty were made.

On Wednesday, the Naugatuck Police Department and partner agencies executed a search and seizure warrant at Black Rock Canines on Hunters Mountain Road. Police said evidence was seized as a result and the investigation remains active at this time.

Police said the investigation stems from complaints of possible animal cruelty.

On Thursday, New Canaan police officer David W. Rivera was arrested. The Department of Criminal Justice said that during a search of Rivera’s home in Stratford, police found quantities of high explosives that were improperly stored. Police said Rivera is alleged to have used these explosives in his business training working dogs for various organizations.

Court documents confirmed that River is the CEO of Black Rock Canines, which was housing 36 dogs.

The agency claims to be the first large-scale breeding program of high performing, healthy service dogs. His attorney explained the reasoning for Rivera holding explosives.

“The way the dogs are able to detect explosives is to have them, have access to the scent of the explosives. It’s part of the process,” Rivera’s attorney said.

According to the warrant, Rivera did not have a permit to possess the high explosives.

The Naugatuck Police Department said they will provide updates on their investigation as additional information becomes available.

This is a developing story. Stay with News 8 for updates.