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Crime Solvers Central
298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP3891) and 5 other sources
In the winter of 1975, a 22-year-old woman named Aleca Renee Manning, also known by her nickname Lisa, disappeared in Phoenix, Arizona. On the evening of February 17th, Aleca, a woman of mixed White and Native American heritage, attended a concert at the Celebrity Theatre on North 32nd Street with friends. At some point during the event, she became separated from her companions. The last confirmed sighting of Aleca was at approximately 10:30 p.m. that night. She was dressed in a light green blouse, moss green pants, a dark green floor-length coat, and dark tan shoes. After the concert, Aleca never made it back to her home, and her absence was further noted when she failed to appear for work, sparking immediate concern among those who knew her.

Aleca was born in Fairbanks, Alaska, on March 13, 1952, and was adopted by James and Norma Manning. Described as having brown hair and green eyes, she stood about 5 feet 2 inches tall and weighed around 125 pounds. Friends and family remember her as a friendly and trusting person, sometimes characterized as a 'happy flower child' who might have been a bit naive. After her parents' difficult divorce, Aleca and her mother moved to Arizona. She graduated from Westwood High School in Mesa in 1970. The disappearance of their only child was a devastating blow to her parents. Her father passed away in 1971, and her mother, Norma, who never stopped searching for answers, passed away in 2008 without ever knowing what happened to her daughter. In 1982, seven years after she was last seen, Aleca Renee Manning was legally declared deceased.

The investigation into Aleca's disappearance has spanned decades, yet very few details have emerged to shed light on her fate. From the outset, law enforcement has suspected foul play was involved in her case. The fact that she vanished after becoming separated from her friends at a public event has led to speculation that she may have been abducted. Despite the passage of time, her case remains open with the Phoenix Police Department. The lack of concrete evidence or witnesses has made it an incredibly challenging investigation, leaving her loved ones with unanswered questions and a sense of unresolved grief. The official narrative of Aleca's case is one of a vibrant young woman who attended a concert one evening and was never heard from again, a story that has left a lasting and painful void for all who knew her.

Last Seen: Feb 17, 1975

Possible Unidentified Matches (2)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

76%Possible
Jane Doe — Tolleson, Arizona - unidentified case UP2069
Jane Doe — Tolleson, Arizona
UP2069 • Found May 17, 1988
View case
Sex ✓Female
Age 100%Est. 25–35 vs 22 when missing
Location 100%11 mi away, same county
TimingFound 13 years after last seen
Height 100%5'3" vs 5'2"–5'3"
Weight 83%159 lb vs 125–135 lb
Hair 100%Brown vs Brown
75%Possible
Jane Doe — Near Casa Grande, Arizona - unidentified case UP67534
Jane Doe — Near Casa Grande, Arizona
UP67534 • Found May 19, 1980
View case
Sex ✓Female
Age 100%Est. 22–27 vs 22 when missing
Location 92%41 mi away, same state
TimingFound 5 years after last seen
Height 100%5'2"–5'4" vs 5'2"–5'3"
Weight 100%120–140 lb vs 125–135 lb
Hair 50%Blond vs Brown

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

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