Arnold Monroy, a 51-year-old male whose race and ethnicity are recorded in available case files as unknown, died in Phoenix, Arizona, on September 30, 2012. Public records compiled by homicide-tracking sites describe his case as a homicide classified as “death by force,” indicating that investigators determined his death resulted from intentional violence rather than natural or accidental causes.
He spent his life in Phoenix, where he was born on August 21, 1961, to parents Arnold Monroy Sr. and Theresa Monroy. At the time of his death, he is noted as being survived by his mother, his children April, Sarah, Joseph, and Angel Monroy, and his sisters Ramona, Hope, and Arlene, along with numerous nieces and nephews; his father, Arnold Monroy Sr., had preceded him in death. These details appear in memorial-style write-ups attached to the homicide listing and show that, behind the bare case data, he was embedded in a large extended family and community in the Phoenix area.
Case databases that aggregate unsolved homicides place the incident at a residence in the 3600 block of West Encanto Boulevard in Phoenix, specifically listing the incident location as 3604 W Encanto Blvd, in Maricopa County. The case is recorded as a murder with “cause unknown,” which means that while authorities deemed the death a criminal homicide, the precise mechanism of the fatal injuries is not specified in the summarized public record. The same entry identifies the investigating agency as the Phoenix Police Department and lists the date reported as September 30, 2012, aligning with the date of death given in other online summaries.
Regarding suspects and arrests, the publicly available information is explicit: cold case listings show “Name: Unknown” under suspect details and mark the case status as “Unsolved.” No specific suspect description, motive, or narrative of events is provided, and there is no indication in these records that anyone has been arrested or charged in connection with Arnold's killing. The most recent update timestamp on the homicide profile—late November 2025—still reflects the case as unresolved, suggesting that, as far as open-source records show, investigators have not publicly identified a perpetrator and the homicide remains an open, unsolved case with no documented arrests.
