Overview

Last seen: April 13, 1971, at approximately 5:30 a.m.

Location: Her apartment at 925 16th Street in Sacramento, California.

Main circumstances: Denise was reportedly last seen by one of her roommates in the early morning. A roommate borrowed Denise’s vehicle that morning and returned during the afternoon, but Denise was gone. Her car remained at the residence, her personal belongings were reportedly left behind, and no subsequent financial activity was known. Denise also failed to appear at work and did not attend her theater commitments. She has never been publicly confirmed as found.

Detailed Case Breakdown

Denise Kathleen Anderson Missing Person Case – Sacramento, California, 1971

Denise Kathleen Anderson was 22 years old when she disappeared from Sacramento, California, on April 13, 1971. More than five decades later, she remains listed as a missing person with the California Department of Justice, and her case continues to be associated with the Sacramento Police Department. Her disappearance is documented under Sacramento Police Department case number 7112652 and NamUs case number MP27540.

Brief Case Summary

Last seen: April 13, 1971, at approximately 5:30 a.m.

Location: Her apartment at 925 16th Street in Sacramento, California.

Main circumstances: Denise was reportedly last seen by one of her roommates in the early morning. A roommate borrowed Denise’s vehicle that morning and returned during the afternoon, but Denise was gone. Her car remained at the residence, her personal belongings were reportedly left behind, and no subsequent financial activity was known. Denise also failed to appear at work and did not attend her theater commitments. She has never been publicly confirmed as found.

Who Was Denise Kathleen Anderson?

Denise was born on July 13, 1948. Official California records describe her as a white woman with brown hair and brown eyes, approximately 5 feet 2 inches tall and weighing about 120 pounds. Other missing-person records give a possible height range of 5 feet 2 inches to 5 feet 4 inches. Dental X-rays are reported to be available.

Denise was involved extensively in Sacramento’s theater community before she disappeared. Historical newspaper and yearbook research indicates she attended Sacramento High School and had participated in theater productions for several years, including productions connected with community theaters and Sacramento-area colleges. She was also employed at a Wells Fargo bank in Sacramento.

At the time she vanished, Denise was involved in a production of Peter Weiss’s Marat/Sade. She was identified in historical theater coverage as playing Simone Evrard. The production was scheduled to open on April 15, 1971—just two days after Denise disappeared.

The Morning Denise Anderson Disappeared

Denise lived with two female roommates in an apartment at 925 16th Street in Sacramento. According to historical case research, one roommate last saw—or observed—Denise at approximately 5:30 a.m. on April 13, 1971. Denise was reportedly asleep at the apartment at that time.

One of the roommates borrowed Denise’s automobile that morning. When the roommate returned with the vehicle at approximately 2:30 p.m., Denise was no longer at the apartment. The car remained there afterward. There is no established public account showing whether Denise left the apartment on foot, entered another vehicle, voluntarily went somewhere with someone she knew, or was taken against her will.

That uncertainty has become one of the most important features of the case. There is no publicly documented final sighting of Denise outside the apartment and no confirmed witness account establishing where she went after approximately 5:30 that morning.

Denise Failed to Arrive at Work and Theater Activities

Denise reportedly did not appear for her job at Wells Fargo after she disappeared. She also failed to attend theater rehearsals despite being involved in a production that was days away from opening. Researchers reviewing historical Sacramento newspaper material have found evidence that she had maintained years of consistent participation in local theater before suddenly vanishing.

Her personal belongings were reportedly left behind, and published accounts state that there was no known activity in her bank account following her disappearance. These circumstances have contributed to questions about whether Denise actually intended to leave Sacramento permanently. However, neither the absence of financial activity nor belongings left behind proves what happened to her.

The Missing Wig

One unusual detail documented in missing-person sources involves a wig Denise was known to wear. Denise normally had long brown hair, but she reportedly sometimes wore a wig that gave her the appearance of having short, dark hair.

That wig was reportedly missing from her apartment after she disappeared.

The significance of the wig is unknown. It could indicate that Denise intentionally took it with her when she left, but there is no publicly released evidence establishing when she last wore it, why she might have taken it, or whether it had anything to do with her disappearance.

What Happened to Denise Anderson?

There is no publicly identified suspect in Denise Kathleen Anderson’s disappearance, and no publicly documented evidence establishes that a particular person harmed her.

Over the years, amateur researchers have discussed possible connections to offenders who lived in or operated around Northern California during that era. Online theories have mentioned figures including the Zodiac Killer, Joseph James DeAngelo and convicted murderer Phillip Arthur Thompson. Those theories remain speculative. No law-enforcement source located for this article identifies any of those individuals as a suspect in Denise’s disappearance.

That distinction is especially important because Denise’s disappearance occurred during a period in which several women were murdered or disappeared in Northern California. Geographic or chronological proximity alone does not demonstrate that the cases were committed by the same offender.

Is Denise Anderson’s Case a Homicide Investigation?

Public records continue to classify Denise as missing. There has been no publicly confirmed recovery of her remains and no official finding establishing when or how she died.

Because Denise would now be well into her seventies if alive, and because she apparently left no known trail following April 13, 1971, homicide or foul play is naturally considered in public discussions of the case. Nevertheless, it would be inaccurate to describe her disappearance as a solved or confirmed homicide without additional evidence.

The California Department of Justice continues to display Denise in its missing-person database with the Sacramento Police Department as the reporting agency.

Latest Publicly Available Investigation Information

As of 2026, Denise Kathleen Anderson remains publicly listed as missing. The California Department of Justice continues to carry her active missing-person entry, showing an April 13, 1971 last-seen date and Sacramento Police Department case number 7112652.

NamUs case MP27540 has also been reported as active in 2026. A detailed independent review of the case was substantially revised in February 2026 after researchers examined historical newspaper records, census information, yearbooks and theater coverage. That work expanded the publicly available picture of Denise’s life but did not report a law-enforcement breakthrough.

Websleuths participants monitoring her NamUs listing reported that the NamUs page was updated in September 2025. Participants said they did not observe a major new development in the publicly visible case information, although the record continued to include or clarify information concerning Denise’s wig and comparisons with unidentified-person cases. Those posts are community observations rather than official investigative announcements.

No publicly available source located for this article reports an arrest, named official suspect, confirmed DNA identification, recovery of Denise’s remains or resolution of her disappearance.

Why the Denise Kathleen Anderson Case Remains Difficult

The known window in which Denise disappeared is extraordinarily broad for an investigation with so little surviving public information. She was reportedly at home at about 5:30 a.m., yet by approximately 2:30 p.m. she was gone.

Investigators and researchers therefore have to account for roughly nine hours without a publicly documented sighting. Denise apparently did not have her own vehicle available during much of that period because her roommate had borrowed it. How she would have traveled—if she voluntarily left the apartment—is consequently an important unanswered question.

More than 55 years have now passed. Witnesses may have died, memories fade, properties change and records from the early 1970s may be incomplete. At the same time, advances in DNA analysis, unidentified-remains comparisons, digitized newspapers and genetic genealogy have allowed some cases from the same era to be revisited in ways investigators in 1971 could not have anticipated.

Denise Kathleen Anderson Is Still Missing

Denise’s case stands out because she appears to have had an established life in Sacramento—a job, roommates, a vehicle and substantial involvement in theater—yet virtually no confirmed trail emerged after the morning of April 13, 1971.

The absence of an answer does not establish a particular theory. What remains documented is that Denise Kathleen Anderson disappeared from Sacramento at age 22 and has never been publicly confirmed as located.

Anyone with information concerning Denise Kathleen Anderson, including information that may have seemed insignificant at the time, should contact the Sacramento Police Department and reference case number 7112652 or NamUs MP27540.