News Summary
A 35-year-old man named Matthew Dieringer has been arrested for the murder of 67-year-old Frank Quaranta on Labor Day. The authorities apprehended Dieringer in Phoenix after identifying him as the primary suspect. Dieringer, with a history of violence, was on probation for a prior theft conviction at the time of the murder. The community mourns Quaranta, known for his charitable work with the Wesley United Methodist Church. Investigations into the circumstances surrounding the murder continue as authorities seek justice for the victim.
Scottsdale, Arizona – A 35-year-old man named Matthew Dieringer has been arrested for the alleged murder of 67-year-old Frank Quaranta, with the incident occurring on Labor Day, September 1. Dieringer was taken into custody on September 6 in Phoenix after officers identified him as the primary suspect in Quaranta’s death.
Police located Dieringer near 13th Street and Indian School Road in Phoenix following a citizen report that led to his apprehension. The arrest came shortly after Quaranta was discovered dead in his home. Authorities conducted a welfare check after Quaranta failed to appear at work, eventually finding signs of blunt force trauma on his body.
Quaranta was known for his involvement with the Wesley United Methodist Church, where he dedicated time to helping homeless individuals in the community. His charitable efforts may have made him vulnerable to Dieringer, who has a history of violence and deceit and was reportedly at the time of Quaranta’s murder on probation for a prior theft conviction.
Criminal records reveal Dieringer’s troubling past, which includes an 18-month prison sentence in Colorado for torturing and dismembering his roommate’s dogs. His violent behavior towards animals has raised concerns among experts, who believe this could predict a propensity for violence against humans as well. Dieringer’s history also includes past charges associated with felony animal cruelty and theft, as well as an alleged assault of a stranger in downtown Phoenix in the summer of 2024.
Scottsdale Police characterized the murder as a targeted attack, suggesting that Dieringer’s personality traits include a total lack of empathy. Retired FBI agent Lance Leising described him as charismatic and manipulative, characteristics that may have helped Dieringer to gain Quaranta’s trust prior to the alleged violent encounter. It is reported that Dieringer maintained a record of homelessness, often forming friendships with others to secure housing.
While charges regarding Quaranta’s murder are pending, Dieringer is currently being held at the Maricopa County Jail. Scottsdale Police Chief Joe LeDuc praised the effective collaboration between law enforcement and community members that led to the suspect’s swift arrest.
The Wesley United Methodist Church community expressed sorrow over Quaranta’s tragic death, reflecting on his dedication to service and advocacy for the unhoused. Church leaders emphasized the significant impact Quaranta had in supporting the community and offering assistance to those in need.
As this case develops, local authorities continue to investigate the circumstances surrounding Quaranta’s death and the relationship between him and Dieringer. Further details will emerge as the legal process unfolds, with the police reiterating their commitment to seeking justice for the victim.
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Additional Resources
- AZ Family: Police Capture Wanted Suspect in Scottsdale Attack
- Google Search: Matthew Dieringer murder Scottsdale
- Fox 10 Phoenix: Outpouring of Relief After Arrest
- Encyclopedia Britannica: Crime and Violence in Arizona
- 12 News: Scottsdale Murder Suspect Arrested
- Google News: Scottsdale Murder Investigation
Author: STAFF HERE PHOENIX WRITER
PHOENIX STAFF WRITER The PHOENIX STAFF WRITER represents the experienced team at HEREPhoenix.com, your go-to source for actionable local news and information in Phoenix, Maricopa County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as the Waste Management Phoenix Open, Cactus League Spring Training, and Arizona State Fair. Our coverage extends to key organizations like the Greater Phoenix Chamber of Commerce and Visit Phoenix, plus leading businesses in technology and healthcare that power the local economy such as Intel and Banner Health. As part of the broader HERE network, including HERETucson.com, we provide comprehensive, credible insights into Arizona's dynamic landscape.
