Julia Crabbe's family wants to know why Montae Nicholson did NOT call 911 when she was dying of a drug overdose -- and they went to FedEx Field on Sunday to get answers.
TMZ Sports broke the story ... cops say Nicholson dropped Crabbe off at a Virginia hospital on Nov. 13 and left the scene, despite the fact she appeared dead on arrival.
Officials have NOT accused Nicholson of any criminal wrongdoing, but Crabbe's family is clearly PISSED at the NFL player ... and they want answers.
"In her time of need, no one decided to call 911," Crabbe's aunt Shirley Kirkland told FOX 5 in D.