increase font size Petty officer shoots 2 sailors; is stopped, killed on base The gunman drove through a gate at an entrance to Fort Detrick Army base before base personnel confronted him on a road. By MATTHEW BARAKATAssociated Press Share A sheriff's deputy from Frederick County, Md., puts paper bags with evidence into a police vehicle near the scene of a shooting at a business park in Frederick, Md., Tuesday, April 6. AP Photo/Julio Cortez FREDERICK, Md. — A Navy medic shot and critically wounded two U.S. sailors at a military facility Tuesday, then fled to a nearby Army base where he was shot and killed, police and Navy officials said.