v. To release a dangerous or helpless mentally ill person from a hospital because there are no private or public psychiatric beds available.
A 2010 report found that 200 individuals in Virginia who were psychotic and either dangerous or incapable of caring for themselves were "streeted" — slang coined by emergency room doctors for when hospitals knowingly put a psychotic patient on the sidewalk.
—Pete Earley, “Deeds attack shows that our system is a mess: Column,” USA Today, November 21, 2013
Late last year, Gov. Robert F. McDonnell proposed more than $7 million in funding for urgently needed crisis-stabilization programs — an alternative to hospitalization that provides short-term treatment and other community services. The proposal would have lessened, but not completely alleviated, the problem of streeting.
—Mira Signer, “Virginia must stop turning away its neediest patients,” The Washington Post, June 24, 2011
2004 (earliest)
This sounds like 'just another nut' call with unfortunately predictable results. Sounds like someone was turned out of the institution when they shouldn't have been and noone [sic] checked to make sure she had her medications on board.

She was a danger to herself and others and should have not been streeted.
—Sylvilagus Aquaticus, “Dallas Police Forced To Shoot, Kill Woman,” The High Road, January 05, 2004