RALEIGH, N.C. — Authorities may have found a new link in the case of a

weapons stash

found at a Raleigh storage facility.

Last week, police and agents with the Bureau of Alcohol, Tobacco and Firearms found dozens of guns and thousands of rounds of ammunition inside Michael McMoil's storage unit. McMoil killed himself after being confronted by police.

Besides assault rifles, ATF agents searching McMoil's storage space Saturday also discovered hand-drawn maps. According to a police source, the maps lead to the home of Raleigh Police Officer David McCollum's home. The map reportedly includes the officer's patrol car number.

McMoil was arrested for assaulting McCollum back in 1993, a charge a jury later convicted him of.

The police source also told WRAL several patrol cars were in McCollum's neighborhood in the days following the discovery of the maps in the storage space.

Howard Cummings, the man who prosecuted McMoil for assaulting McCollum, said police stationed a car in front of his house.

Meanwhile, ATF officials report another man has been arrested in connection with the cache of weapons found last week. On Tuesday, agents charged David Silverman with unlawfully owning and using a firearm.

"It does not appear that any of the information we have would put him together with those weapons, it is just other weapons we have uncovered during the course of the investigation," ATF agent Jim Mercer said.

McMoil rented a room in Silverman's home, which was a short distance away from the storage unit lockers containing the weapons.

Authorities said Silverman may face other charges. They also said that more arrests may soon be made.