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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 (MP5626) and 12 other sources
Mark Allen Miller, a 48-year-old man, vanished after completing his shift as a senior banquet captain at the Clock Tower Resort and Conference Center in Rockford, Illinois, on March 12, 2009. He was a dedicated and social individual, and his disappearance was out of character. The day he went missing, Miller had a conversation with a friend, informing them that he intended to ask his roommate of two years to move out of their shared residence in the 300 block of Whitman Avenue. He later called the same friend to say the conversation had gone better than he had anticipated. His roommate, Manuel Vasquez Rivera, is believed to be the last person to have seen him.

A few days after he was last seen, on either the evening of March 14th or the morning of March 15th, Miller's silver 1998 Chrysler New Yorker was discovered abandoned. The vehicle was found in the 1900 block of Harlem Boulevard, approximately a mile from his home. An investigation of both the car and his apartment yielded no signs of a struggle or any immediate clues as to what might have happened to him. Authorities have expressed interest in speaking with his former roommate, who is believed to have moved out of state, to learn if he has any information regarding Miller's disappearance.

Years later, in October 2012, a significant development occurred when ATV riders discovered Miller's wallet at the Rocky Glen Off-Highway Vehicle Park in south Rockford. This area is often submerged underwater. The discovery of the wallet led to the finding of human remains nearby, initially sparking hope for a resolution in the case. However, it was later determined that the remains did not belong to Mark Miller. His briefcase and car keys have never been located. The case has grown cold over the years, leaving his family, including his parents in Eau Claire, Wisconsin, and his four brothers, without answers. The Rockford Police Department continues to investigate his disappearance. The circumstances surrounding Mark Allen Miller's case remain a mystery, marked by the discovery of his abandoned car and wallet years later, yet providing no definitive explanation for his sudden vanishing.

Last Seen: Mar 12, 2009

Possible Unidentified Matches (5)

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.

81%Moderate
John Doe — Chicago, Illinois - unidentified case UP11512
John Doe — Chicago, Illinois
UP11512 • Found May 2, 2013
View case
Sex ✓Male
Age 100%Est. 45–60 vs 48 when missing
Race 100%White
Location 81%80 mi away, same state
TimingFound 4 years after last seen
Height 100%5'11" vs 5'10"–6'0"
Weight 96%149 lb vs 170–180 lb
Hair 100%Brown vs Brown
78%Possible
John Doe — Chicago, Illinois - unidentified case UP6966
John Doe — Chicago, Illinois
UP6966 • Found Apr 15, 2010
View case
Sex ✓Male
Age 85%Est. 38–55 vs 48 when missing
Race 100%White
Location 81%80 mi away, same state
TimingFound 13 months after last seen
Height 100%5'10" vs 5'10"–6'0"
Weight 100%180 lb vs 170–180 lb
76%Possible
John Doe — Illinois - unidentified case UP10829
John Doe — Illinois
UP10829 • Found Sep 14, 2011
View case
Sex ✓Male
Age 100%Est. 50–60 vs 48 when missing
Race 100%White
Location 80%81 mi away, same state
TimingFound 3 years after last seen
Height 68%6'3" vs 5'10"–6'0"
Weight 14%259 lb vs 170–180 lb
Hair 100%Brown vs Brown
Eyes 70%Hazel vs Green
75%Possible
John Doe — Illinois
UP79964 • Found Mar 12, 2021
View case
Sex ✓Male
Age 100%Est. 35–50 vs 48 when missing
Race 100%White
Location 80%81 mi away, same state
TimingFound 12 years after last seen
Height 100%5'6"–6'0" vs 5'10"–6'0"
Weight 33%103 lb vs 170–180 lb
Hair 70%Gray vs Brown
75%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 48 when missing
Race 100%White
Location 85%64 mi away, same state
TimingFound 17 years after last seen
Height 68%5'7" vs 5'10"–6'0"
Weight 98%151 lb vs 170–180 lb
Hair 70%Gray vs Brown
Eyes 50%Blue vs Green

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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