Aleca Renee Manning, known as Lisa, was 22 when she vanished in Phoenix after attending a concert at the Celebrity Theatre on North 32nd Street. On the evening of February 17, 1975, she became separated from friends during the show; the last confirmed sighting was about 10:30 p.m. She never returned home and did not show up for work that night.

Aleca was born in Fairbanks, Alaska, on March 13, 1952, and was adopted by James and Norma Manning. She was described as mixed White and Native American, about 5 feet 2 inches tall, 125 pounds, with brown hair and green eyes. Friends recalled her as friendly, trusting and sometimes naive. Her father died in 1971; her mother continued searching until her death in 2008. Aleca was legally declared deceased in 1982.

Law enforcement has long treated the disappearance as suspicious and the Phoenix Police Department still lists the case as open. Very few concrete leads or witnesses have been publicly reported.

If anyone attended the Celebrity Theatre that night or remembers Aleca, can you share what you know?