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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 (MP28329) and 1 other source
On a February morning in 2015, after taking his children to school, 52-year-old Anthony 'Tony' Sipple seemingly vanished from his home in the Silverbell Estates area of Arizona City, Arizona. An avid and experienced hiker, Sipple was known to enjoy exploring the Silverbell and Sawtooth Mountains, two ranges visible from his residence. On this particular day, he left with only a blue backpack and a bedroll, leaving behind his wallet and cell phone. It is believed he was wearing a camouflage jacket with 'BAD ROADS' on it, camouflage pants, and tan hiking boots. He may have also been carrying a Glock handgun and a hunting knife, items not unusual for a seasoned outdoorsman in the Arizona wilderness.

The day of his disappearance, February 19, 2015, began like any other for the Sipple family. However, when Anthony did not return, concern grew. It was unlike him to venture out without informing anyone of his intended route or expected return time. This lack of a planned destination significantly complicated the search efforts that were to follow. His family and friends were left with a vast and rugged landscape to consider, with no clear starting point to begin their search. The Pinal County Sheriff's Office was notified and a missing person case was opened, but the initial days of searching yielded no clues as to his whereabouts.

Despite the passage of time, the investigation into Anthony Sipple's disappearance remains open. His case is a somber reminder of how quickly a life can change, and how the vastness of nature can swallow a person without a trace. The official narrative suggests that Sipple, a man with a deep appreciation for the outdoors, walked away from his life for reasons unknown. The details surrounding his departure, such as leaving his wallet and phone, have led to much speculation but no concrete answers. The core of this case remains a man's unexplained absence, a family's enduring hope for resolution, and the stark reality of a search with no end in sight. The mountains he so loved to explore now hold the secret to his whereabouts, a secret they have yet to reveal.

Last Seen: Feb 19, 2015

Links to Additional Sources (1)

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Possible Unidentified Matches (6)

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.

78%Possible
John Doe — Rio Verde, Arizona - unidentified case UP13861
John Doe — Rio Verde, Arizona
UP13861 • Found Apr 28, 2015
View case
Sex ✓Male
Age 100%Est. 50–65 vs 52
Race 100%White
Location 84%67 mi away, same state
TimingFound 2 months after last seen
Height 84%5'11" vs 5'8"–5'9"
77%Possible
John Doe — Peoria, Arizona - unidentified case UP142022
John Doe — Peoria, Arizona
UP142022 • Found Feb 12, 2025
View case
Sex ✓Male
Age 100%Est. 57–70 vs 52 when missing
Race 100%White
Location 81%80 mi away, same state
TimingFound 10 years after last seen
Height 100%5'10" vs 5'8"–5'9"
Weight 97%120–150 lb vs 170–175 lb
77%Possible
John Doe — Tucson, Arizona - unidentified case UP158804
John Doe — Tucson, Arizona
UP158804 • Found Dec 14, 2025
View case
Sex ✓Male
Age 100%Est. 48–62 vs 52 when missing
Race 100%White
Location 88%53 mi away, same state
TimingFound 11 years after last seen
Height 100%5'4"–5'8" vs 5'8"–5'9"
76%Possible
John Doe — Rio Verde, Arizona - unidentified case UP118816
John Doe — Rio Verde, Arizona
UP118816 • Found Mar 3, 2024
View case
Sex ✓Male
Age 100%Est. 38–52 vs 52 when missing
Race 100%White
Location 84%67 mi away, same state
TimingFound 9 years after last seen
Height 100%5'6"–5'8" vs 5'8"–5'9"
76%Possible
John Doe — Tucson, Arizona - unidentified case UP82870
John Doe — Tucson, Arizona
UP82870 • Found Jul 23, 2021
View case
Sex ✓Male
Age 85%Est. 50–70 vs 52 when missing
Race 100%White
Location 88%55 mi away, same state
TimingFound 6 years after last seen
Height 100%5'10" vs 5'8"–5'9"
75%Possible
John Doe — Tucson, Arizona - unidentified case UP102760
John Doe — Tucson, Arizona
UP102760 • Found Feb 9, 2023
View case
Sex ✓Male
Age 85%Est. 45–70 vs 52 when missing
Race 100%White
Location 88%53 mi away, same state
TimingFound 8 years after last seen
Height 100%5'4"–5'10" vs 5'8"–5'9"

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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