Want a true crime podcast that feels a little closer to home? 

Pinal County Attorney Kent Volkmer and his main media man, Mike Pelton, dove into the case of Maricopa’s 2016 “garage murder” in the third episode of their new podcast released yesterday. 

It was what Volkmer called “the single greatest amount of premeditation” he has ever seen in a case. 

Pinal County Attorney’s Office debuted the podcast in January with another disturbing Maricopa case — the infamous “YouTube Mom” who died while awaiting trial for 30 felony counts of child abuse. 

‘Paternity test tragedy’ 

Maricopa police found Michael Agerter shot dead in his car in his garage Dec. 16, 2016. 

It was just hours after he submitted DNA samples for an ongoing child custody court battle with his ex-girlfriend, Kathryn Sinkevitch. 

Detectives had to be cunning and stay a step ahead of Sinkevitch to pin her down as suspect No. 1. 

“She had an excuse for everything,” Volkmer said.  

Eventually, her alibis crumbled at the hands of detectives and Sinkevitch was sentenced to life in prison on June 2, 2019. It’s the harshest punishment in Arizona after the death penalty. 

Brian Petersheim Jr., Reporter
Brian Petersheim Jr., Reporter
Brian became part of the InMaricopa team in October 2020, starting as a multimedia intern with a focus on various multimedia tasks. His responsibilities included file organization and capturing photos of events and incidents. After graduating from Maricopa High School in the class of 2021, his internship seamlessly transitioned into a full-fledged job. Initially serving as a dedicated photographer, Brian's role evolved in October 2021 when he took on a new beat as a writer. He is currently pursuing his studies at the Walter Cronkite School of Journalism and Mass Communication. Brian's primary focus lies in covering public safety-related stories. In his free time, Brian finds joy in spending quality time with his family and embarking on adventures to explore the landscapes around him.
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