Martinez's family says she was recently engaged, WTOP reported.
Court records show that Crawford has a history of mental illness and has used synthetic drugs that can produce deranged behavior, the Post reported.
Police said Martinez was stabbed six times in the head and neck, and once in the back. The attacker ran, police said, discarding a bloody knife and a mustard-colored shirt as Martinez stumbled into a Chinese carryout restaurant, the newspaper reported.
“It’s unsettling for anyone who lives in this city to see this happen. It’s an isolated incident. I’m sure that doesn’t bring any level of comfort to the Martinez family,” D.C. police Chief Peter Newsham said at a news conference.