a guard at the u.s. census bureau was shot in the abdomen and later died thursday as part of what began with a suspect kidnapping his own wife at gunpoint in washington .
authorities locked down the suitland , maryland campus just before 8 pm thursday amid reports that the shooter had barricaded himself inside after ramming the front gates .
however , the shooter had instead taken some three dozen police officers on a wild chase back into d.c. that ended when officers shot him on a northeast washington street .