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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 (MP148857)
In the wide span of time between the spring and fall of 2015, a 44-year-old man named Dennis Michael Sheehan was last seen by his family in Chicago, Illinois. Standing at five feet ten inches tall and weighing around 150 pounds, with brown hair and green eyes, Dennis was a familiar face to his loved ones. However, after that broad period of his last contact, communication from him ceased, and he has not been seen or heard from since. The lack of a precise last-seen date adds a layer of complexity and sorrow to his disappearance, leaving a void of information for those who care for him.

The circumstances surrounding the time he went missing are vague. There is no public record detailing what he was wearing or his state of mind during his last interactions with family. This uncertainty paints a difficult picture for investigators and a painful reality for his family, who are left to wonder what happened during that undefined stretch of months. The silence that followed his last contact has now stretched over years, deepening the mystery and the concerns for his well-being.

The Cook County Sheriff's Police Department is the investigating agency in charge of his case. Efforts to locate him have been ongoing, but the passage of time without any new leads presents significant challenges. The case of Dennis Michael Sheehan is a somber reminder of the many individuals who disappear, leaving behind unanswered questions and families in a perpetual state of uncertainty. His disappearance is an open wound for those who know him, a story without an ending, centered on a man from Chicago who vanished from the lives of his family sometime in 2015.

Last Seen: Apr 1, 2015

Links to Additional Sources (0)

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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.

80%Moderate
John Doe — Illinois
UP79964 • Found Mar 12, 2021
View case
Sex ✓Male
Age 100%Est. 35–50 vs 44 when missing
Race 100%White
Location 100%3 mi away, same county
TimingFound 6 years after last seen
Height 100%5'6"–6'0" vs 5'10"
Weight 52%103 lb vs 150 lb
Hair 40%Gray vs Brown
80%Moderate
John Doe — Illinois - unidentified case UP17083
John Doe — Illinois
UP17083 • Found Sep 1, 2017
View case
Sex ✓Male
Age 80%Est. 28–42 vs 44 when missing
Race 100%White
Location 100%3 mi away, same county
TimingFound 2 years after last seen
Height 100%5'9" vs 5'10"
Weight 84%123 lb vs 150 lb
78%Possible
John Doe — Lemont, Illinois - unidentified case UP54761
John Doe — Lemont, Illinois
UP54761 • Found Dec 18, 2018
View case
Sex ✓Male
Age 85%Est. 40–60 vs 44 when missing
Race 100%White
Location 98%18 mi away, same county
TimingFound 4 years after last seen
Height 84%5'8" vs 5'10"
Weight 77%118 lb vs 150 lb
Hair 100%Brown vs Brown
Eyes 0%Brown vs Green
78%Possible
John Doe — Chicago, Illinois - unidentified case UP53660
John Doe — Chicago, Illinois
UP53660 • Found Oct 22, 2018
View case
Sex ✓Male
Age 80%Est. 28–42 vs 44 when missing
Race 100%White
Location 100%8 mi away, same county
TimingFound 4 years after last seen
Height 100%5'10" vs 5'10"
Weight 41%203 lb vs 150 lb
Hair 100%Brown vs Brown
Eyes 0%Brown vs Green
78%Possible
John Doe — Chicago, Illinois - unidentified case UP51609
John Doe — Chicago, Illinois
UP51609 • Found Jun 28, 2018
View case
Sex ✓Male
Age 85%Est. 45–65 vs 44 when missing
Race 100%White
Location 100%8 mi away, same county
TimingFound 3 years after last seen
Height 84%5'3"–5'8" vs 5'10"
77%Possible
John Doe — Chicago, Illinois
UP97269 • Found Aug 23, 2022
View case
Sex ✓Male
Age 100%Est. 45–60 vs 44 when missing
Race 60%Hispanic
Location 100%8 mi away, same county
TimingFound 7 years after last seen
Height 100%5'6"–5'10" vs 5'10"
Weight 93%130 lb vs 150 lb
77%Possible
John Doe — Waukegan, Illinois - unidentified case UP163526
John Doe — Waukegan, Illinois
UP163526 • Found Apr 8, 2026
View case
Sex ✓Male
Age 100%Est. 50–65 vs 44 when missing
Race 100%White
Location 91%42 mi away, same state
TimingFound 11 years after last seen
Height 68%5'7" vs 5'10"
Weight 100%151 lb vs 150 lb
Hair 70%Gray vs Brown
Eyes 50%Blue vs Green
76%Possible
John Doe — Harvey, Illinois
UP71363 • Found Jun 13, 2020
View case
Sex ✓Male
Age 85%Est. 35–55 vs 44 when missing
Race 100%White
Location 100%11 mi away, same county
TimingFound 5 years after last seen
Height 75%5'3"–5'10" vs 5'10"
76%Possible
John Doe — Chicago, Illinois
UP14526 • Found Jul 19, 2015
View case
Sex ✓Male
Age 85%Est. 40–60 vs 44
Race 100%White
Location 100%8 mi away, same county
TimingFound 4 months after last seen
Height 20%5'4" vs 5'10"
Weight 100%160 lb vs 150 lb
Hair 100%Brown vs Brown
75%Possible
John Doe — Palos Heights, Illinois
UP89918 • Found Feb 27, 2022
View case
Sex ✓Male
Age 85%Est. 40–60 vs 44 when missing
Race 100%White
Location 100%10 mi away, same county
TimingFound 7 years after last seen
Height 75%5'6"–6'2" vs 5'10"

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.