SAN FRANCISCO — The families of two UPS drivers killed by a co-worker have filed a lawsuit alleging the shooting should have been prevented.

The San Francisco Chronicle reports ( relatives of Benson Louie and Michael Lefiti on Tuesday sued United Parcel Service, Allied Universal Security Services, and the owner of the building.

On June 14, UPS driver Jimmy Lam fatally shot Louie, Lefiti and UPS driver Wayne Chan. He then killed himself in front of police.

The lawsuits, filed in San Francisco Superior Court, allege UPS employees had complained about security problems at the building before Lam carried out the deadly rampage against his colleagues.

Attorneys for the families say metal detectors and security guards failed to stop Lam, who was armed with a MAC-10 submachine gun and a pistol.


Information from: San Francisco Chronicle,