Crime Solvers Central
Crime Solvers Central
302 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 (MP24113) and 2 other sources
In the summer of 1996, a family's life was irrevocably changed when Ronald J. Hackmaster, a 35-year-old man, vanished from Sun City, Arizona. On August 4th, he was seen for the last time at his place of employment in the quiet retirement community located in Maricopa County. At the time he went missing, he was described as a white male with brown hair and brown eyes, standing at 5 feet 9 inches tall and weighing approximately 200 pounds. A distinguishing feature was a tattoo of a woman's head on his left arm. The clothing he may have been wearing when he disappeared consisted of a yellow shirt, khaki shorts, and black tennis shoes. The report of his disappearance was filed with the Maricopa County Sheriff's Office a few days later, on August 8, 1996, marking the official beginning of a long and painful search for answers.

As weeks turned into months and months into years, the trail grew cold, leaving family and investigators with very few leads to follow. The circumstances surrounding his disappearance were scant from the beginning, with little information available to the public beyond the fact that he was gone after leaving his job. Decades passed without any resolution, and his case remained one of the many lingering mysteries that haunt families of the missing. The digital age brought new tools for visibility, and in April 2014, his case was entered into the National Missing and Unidentified Persons System a national database dedicated to resolving such cases, in the hope that renewed exposure might finally shed some light on what happened to him.

Over the years, his case has been cross-referenced with unidentified remains, a standard but heart-wrenching part of the process for long-term missing person investigations. For instance, his name was formally ruled out as a match for skeletal remains discovered in the South Mountain Park area, a small piece of information that, while not bringing him home, helped to narrow the vast field of unknown possibilities. The official status of his missing person case remains unchanged, a silent testament to a life interrupted. However, an obituary for his father, who passed away in early 2024, sorrowfully lists his son 'Ron' as having preceded him in death. This mention suggests a grim conclusion to his long absence, though the specific details and circumstances of when or how his life may have ended are not publicly known. The case of Ronald Hackmaster is a poignant story of a man who disappeared from his everyday life, leaving behind a void of information and a search for answers that has spanned decades.

Last Seen: Aug 4, 1996

Links to Additional Sources (2)

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Possible Unidentified Matches (10)

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.

85%Strong
John Doe — Phoenix, Arizona - unidentified case UP1971
John Doe — Phoenix, Arizona
UP1971 • Found Apr 7, 2001
View case
Sex ✓Male
Age 100%Est. 30–40 vs 35 when missing
Race 100%White
Location 98%17 mi away, same county
TimingFound 5 years after last seen
Height 100%5'8" vs 5'9"
Weight 80%160 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Phoenix, Arizona - unidentified case UP819
John Doe — Phoenix, Arizona
UP819 • Found Aug 2, 2007
View case
Sex ✓Male
Age 100%Est. 35–50 vs 35 when missing
Race 100%White
Location 100%10 mi away, same county
TimingFound 11 years after last seen
Height 100%5'9" vs 5'9"
Weight 75%155 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Laveen, Arizona - unidentified case UP2028
John Doe — Laveen, Arizona
UP2028 • Found Nov 23, 2003
View case
Sex ✓Male
Age 100%Est. 20–35 vs 35 when missing
Race 100%White
Location 98%17 mi away, same county
TimingFound 7 years after last seen
Height 68%6'0" vs 5'9"
Weight 100%196 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
82%Moderate
John Doe — Arizona
UP2029 • Found Nov 23, 2003
View case
Sex ✓Male
Age 85%Est. 20–40 vs 35 when missing
Race 100%White
Location 97%23 mi away, same county
TimingFound 7 years after last seen
Height 100%5'9" vs 5'9"
Weight 81%161 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
81%Moderate
John Doe — Casa Grande, Arizona - unidentified case UP15974
John Doe — Casa Grande, Arizona
UP15974 • Found May 24, 1999
View case
Sex ✓Male
Age 85%Est. 40–60 vs 35 when missing
Race 100%White
Location 88%55 mi away, same state
TimingFound 3 years after last seen
Height 100%5'9" vs 5'9"
Weight 100%190 lb vs 200 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
80%Moderate
John Doe — Winterhaven, California - unidentified case UP15292
John Doe — Winterhaven, California
UP15292 • Found May 31, 1997
View case
Sex ✓Male
Age 100%Est. 25–40 vs 35
Race 100%White
Location 65%149 mi away
TimingFound 10 months after last seen
Height 100%5'8" vs 5'9"
Weight 80%160 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
80%Moderate
John Doe — Mesa, Arizona - unidentified case UP1947
John Doe — Mesa, Arizona
UP1947 • Found Aug 23, 1997
View case
Sex ✓Male
Age 85%Est. 20–40 vs 35 when missing
Race 100%White
Location 95%28 mi away, same county
TimingFound 13 months after last seen
Height 68%5'6" vs 5'9"
Weight 56%140 lb vs 200 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
79%Possible
John Doe — Winterhaven, California - unidentified case UP15254
John Doe — Winterhaven, California
UP15254 • Found Mar 23, 1998
View case
Sex ✓Male
Age 100%Est. 30–35 vs 35 when missing
Race 100%White
Location 65%149 mi away
TimingFound 20 months after last seen
Height 100%5'8" vs 5'9"
Weight 100%180 lb vs 200 lb
Hair 100%Brown vs Brown
79%Possible
John Doe — Winterhaven, California
UP15315 • Found Jul 14, 1996
View case
Sex ✓Male
Age 100%Est. 35–45 vs 35
Race 100%White
Location 65%149 mi away
TimingFound same day as last seen
Height 100%5'8" vs 5'9"
Weight 100%180 lb vs 200 lb
Hair 40%Gray vs Brown
Eyes 100%Brown vs Brown
79%Possible
John Doe — Laveen, Arizona - unidentified case UP6601
John Doe — Laveen, Arizona
UP6601 • Found Nov 22, 2009
View case
Sex ✓Male
Age 100%Est. 30–45 vs 35 when missing
Race 100%White
Location 98%17 mi away, same county
TimingFound 13 years after last seen
Height 100%5'8" vs 5'9"
Weight 59%142 lb vs 200 lb

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.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.