Overview

Last seen: January 20, 1950
Location: Santa Rosa, Sonoma County, California
Age when missing: 67
Classification: Endangered Missing
NamUs: MP129354

William Biocca disappeared after leaving his Santa Rosa home at approximately 8:00 a.m. for what was expected to be a short morning walk. He had eaten breakfast before leaving, did not take a raincoat, and his son expected him to return within about an hour. Biocca never came home. His family reported him missing approximately 14 hours after he left. No confirmed evidence that he was the victim of homicide has been publicly released, and his whereabouts remain unknown.

Detailed Case Breakdown

William Biocca Missing Person Case: Santa Rosa, California — Disappeared in 1950

Brief Case Summary

Last seen: January 20, 1950
Location: Santa Rosa, Sonoma County, California
Age when missing: 67
Classification: Endangered Missing
NamUs: MP129354

William Biocca disappeared after leaving his Santa Rosa home at approximately 8:00 a.m. for what was expected to be a short morning walk. He had eaten breakfast before leaving, did not take a raincoat, and his son expected him to return within about an hour. Biocca never came home. His family reported him missing approximately 14 hours after he left. No confirmed evidence that he was the victim of homicide has been publicly released, and his whereabouts remain unknown.

William Biocca Disappears During a Morning Walk in Santa Rosa

William Biocca was 67 years old when he vanished from Santa Rosa, California, on January 20, 1950. What apparently began as an ordinary morning walk became a disappearance that has remained unresolved for more than seven decades.

According to available case information, Biocca ate breakfast at home and left at approximately 8:00 a.m. to take a walk. His son believed he would be gone for only about an hour. The fact that Biocca did not take a raincoat has also been cited as an indication that he apparently did not expect to remain away from home for an extended period.

He Never Returned Home

When Biocca failed to return, his absence eventually became alarming enough that his family contacted authorities. Available records state that he was reported missing approximately 14 hours after he left the house, placing the report at roughly 10:00 p.m. that night.

There is no publicly documented evidence that Biocca subsequently contacted relatives, voluntarily relocated, or was reliably seen after leaving home that morning. His disappearance is currently classified as an endangered missing-person case, rather than a confirmed homicide.

What William Biocca Looked Like When He Disappeared

Biocca was described as a white male who stood approximately 5 feet 10 inches to 5 feet 11 inches tall and weighed between 210 and 220 pounds. He reportedly spoke with a pronounced Italian accent.

When he disappeared, he was believed to be wearing a heavyweight brown sweater, brown shirt, khaki pants, rubber overshoes and a brown felt hat. A photograph of Biocca dating from around the time of his disappearance is now publicly available with his case information.

These details could remain important in historical comparisons involving unidentified remains, particularly because clothing, estimated height, age and distinctive personal characteristics sometimes provide avenues for reviewing decades-old cases.

A Case With Very Little Publicly Available Information

One of the difficulties surrounding William Biocca’s disappearance is how little information from the original 1950 investigation is readily available online.

The Charley Project, which added Biocca’s case file and lists information drawn from NamUs and The Santa Rosa Press Democrat, specifically notes that few details concerning his disappearance are available. Its case page was last updated on November 1, 2024.

Biocca has nevertheless entered modern missing-person databases. CaseTrace currently lists him among Santa Rosa missing-person cases and identifies his official source as NamUs, with NamUs case number 129354.

Recent Attention to the William Biocca Case

The case received renewed online visibility in 2024. A dedicated Websleuths discussion concerning Biocca was opened in September 2024, and his Charley Project case file followed later that year. These developments have made information and a photograph from the decades-old disappearance substantially easier for contemporary researchers to find.

There has also been more recent community discussion concerning whether Biocca should be compared with unidentified remains from another state. In March 2025, a Websleuths participant suggested considering Biocca as a possible candidate for an unidentified man whose skeletal remains were found north of Bandon, Oregon, in 1972. The commenter pointed to broad similarities such as height and the presence of a hat.

That suggestion should not be treated as an official investigative development or an identification. It originated in an online discussion, and the publicly available sources reviewed for this article do not establish that law enforcement or NamUs has formally connected William Biocca with those remains, submitted him for comparison, or reached an exclusion or identification.

Latest Publicly Available Investigation Information

As of August 2026, William Biocca continues to appear in contemporary missing-person resources as an unresolved case. NamUs-linked CaseTrace data still lists him as missing from Santa Rosa since January 20, 1950, under NamUs MP129354.

No publicly released announcement was located indicating that Biocca has been found, identified among unidentified remains, or that investigators have established what happened to him.

The Sonoma County Sheriff’s Office remains the investigating agency identified in published case information. The Charley Project lists 707-565-2569 for the department in connection with Biocca’s case. The Sheriff’s Office’s current public directory additionally lists its Investigations division at 707-565-2185 and its Cold Cases line at 707-565-2727.

What Happened to William Biocca?

There is currently not enough publicly available evidence to responsibly say why Biocca disappeared.

An accident, medical emergency, exposure to the elements, voluntary departure, foul play and other scenarios cannot be confirmed or eliminated from the limited information available to the public. The known circumstances establish only that he left home expecting to take a relatively short walk and did not return.

More than 76 years later, Biocca’s case demonstrates the particular difficulties presented by historical missing-person investigations. Witnesses die, physical evidence may be lost, original investigative records can become difficult to locate, and unidentified-person cases may have been filed under entirely separate jurisdictions long before DNA comparison systems existed.

Modern databases provide an opportunity that investigators in 1950 did not have: William Biocca’s information can now potentially be compared against unidentified-person records from across the country.