Sergeant Dave Walker
Sgt. Dave Walker was born in Aurora, Colorado and raised in St. Louis, Missouri. After college, he joined the Tulsa Police Department in 1982. Before joining Homicide in 2011, he worked extensively in many different units including Patrol, Narcotics, Burglary, Robbery, and SWAT. He has received numerous medals for his outstanding police work, including a Medal of Valor for a fire rescue in 1987, a Chief’s Medal for leading a violent crime task force and a medal for leading an extensive federal narcotics investigation.
Walker believes that family is very important to an investigator. “Family gives you perspective.” He and his wife have raised three sons. Two of his sons work in law enforcement and his third son works as an assistant baseball coach at a university.
Walker has coached several youth baseball teams and believes that youth sports can teach children essential life skills as they reach adulthood. He finds parallels in coaching sports and managing a squad as he continues to lead this group of dedicated men and women of homicide.
Corporal Nathan Schilling
Originally from Phoenix, Arizona, Corporal Nathan Schilling now lives on a farm just outside of Tulsa with his wife and three kids. He’s a 14-year-veteran of the Tulsa Police Department. He worked as a Crime Scene Detective for six years prior to joining Homicide two years ago.
Corporal Schilling likes the challenges of homicide work and enjoys the payoff of seeing criminals brought to justice. When he’s not working, Schilling likes to spend time in the outdoors with his family.
Detective Dianna Baumann
Det. Dianna Baumann joined Homicide so she could help people, but says, “I get excited to catch ‘bad’ guys, too.” Before she transferred Homicide in 2010, she spent seventeen years in patrol and five years working in Child Crisis. She enjoys closing cases and helping to offer some closure to the victims’ families.
While working in Child Crisis, Detective Baumann received a Chief’s award for a multi-victim sexual abuse investigation.
Baumann was born and raised in Tulsa. To cope with the stress of the job, Baumann runs marathons and enjoys spending time with her husband and her two children.
Detective John Brown
Detective John Brown is a native of Beggs, Oklahoma. He joined the Tulsa Police Department in 1989, and worked in Burglary, Robbery, Patrol and the Special Investigations Division before joining Homicide in 2012.
In 1994 Detective Brown received of a Medal of Valor for an act of outstanding bravery while working as an undercover investigator in VICE.
Brown was inspired to become a police officer by his brother. He later joined Homicide to work with Sgt. Dave Walker, his long time friend and colleague since the mid-90s. According to Brown, the best and most challenging part of a homicide investigation is interviewing a suspect and getting him to confess to his crime; “getting inside a killer’s mind.”
To relieve the stress of work, Brown spends his free time with family, including his three children. He also loves traveling with his wife Kathy.
Detective Chase Calhoun
A native of Houston, Texas, and proud Chickasaw Indian, Det. Chase Calhoun has been in law enforcement for 10 years. Before being selected to join the Homicide Unit, he worked several other units of TPD, such as Gang, Sex Crimes and Robbery.
Calhoun was drawn to the police department because he finds the work extremely challenging, yet rewarding. “Solving difficult or challenging cases and seeing the end result makes me proud.”
Calhoun likes to spend time with friends and family, working out or cheering on all of Houston’s professional sports teams. He also enjoys piloting small aircrafts.
Detective Matthew Frazier
Before his career in law enforcement, Det. Matthew Frazier played basketball at Oral Robert University. Often before a game he would talk to the officers at the stadium about what it was like to be a police officer. Inspired to help out in the community, Frazier joined the Tulsa PD where he worked for ten years before joining the Homicide Unit in 2014.
A proud father of two, Frazier spends much of his free time at his children’s sporting events. He met his wife, Nicole, while he was a strength coach for the Colorado Rockies. During a game, he wrote his name and phone number on a baseball and threw it to Nicole in the stands. Since then, he and his wife have shared a love for the game of baseball.
Frazier loves the outdoors and enjoys mountain biking, road cycling and backpacking with friends and family.
Detective Mark Kennedy
A former member of the Fugitive Task Force, Det. Mark Kennedy has been with Tulsa Homicide since 2006. Kennedy says, “the excitement of the job and serving the public is what made me want to be a homicide detective.” Kennedy doesn’t mind the pressures of his job because he knows how important it is to his community.
Kennedy is the recipient of numerous awards, including two Medals of Valor. He was awarded the first medal in 1994 while working in VICE, and the second in 2004 while being part of the Northern Oklahoma Violent Task Force. He was also awarded the department commendation medal and the Bergen County New Jersey Apprehension award for capturing two of America’s Most Wanted criminals in 2001.
Mark Kennedy has been married for 27 years and has a 21-year-old son. He spends his down time doing woodwork, working out and spending time with his family.
Detective Ronnie Leatherman
An Oklahoma native, Ronnie Leatherman spent eight years working in Narcotics before transferring to Homicide. He loves working in Homicide because every investigation is unique. He finds the satisfaction of getting a killer off the street helps him push through the challenges of the job. He says, “I love the freedom to chase down bad guys instead of being stuck at a desk all day.”
Leatherman spends his free time traveling with his wife and three children and playing basketball to relax.
Detective Justin Ritter
In the twelve years Det. Justin Ritter has been part of the Tulsa Police Department, he has worked in a wide range of units, including Vice, Robbery, Narcotics, Street Crimes and Crime Scene Investigation. He takes pride in making a positive difference in a “crazy world.” He enjoys putting together the puzzle pieces of a homicide investigation and figuring out who the suspect is.
In Ritter’s free time, he enjoys doing yard work, working out and riding mountain bikes and road bikes. Spending time with his wife and two children helps him cope with the stress of the job.
Detective Max Ryden
Det. Max Ryden is a 20-year veteran of the Tulsa PD where he spent 10 years working the Burglary and Robbery Units before joining Homicide in 2017. Ryden’s interest in law enforcement grew after his first college criminal justice class.
Det. Ryden appreciates the community he serves and wants to find justice for the family of the victims. “I don’t stop thinking about the case until it is finished.”
When not working a case, Ryden enjoys watching a Kansas City Royals game, playing other sports such as golf and tennis, and spending time with his wife and two children.
Detective Jason White
Being the son of a California Highway Patrolman, Det. Jason White was drawn to law enforcement since he was a child. His interest in homicide came from a high profile case he saw in the news when he was young.
In addition to being a homicide detective, White is the crisis negotiator for the Special Operations Team and a member of the Critical Incident Response Team. He says, “Homicide is more of a lifestyle as opposed to a job.”
White is married and the father of five.
Detective Michael Zenoni
Originally from Harper Woods, Michigan, Det. Michael Zenoni joined Tulsa PD in 1981 before he moved to Homicide in 1999. He was also part of the Special Operation Team (SWAT) for twelve years, and worked in Burglary for one year.
He thrives on the challenges that come with the job. Part of his drive comes from the desire to see the “good guys” win.
Zenoni is married with two children. In his downtime, he enjoys spending time with his family and friends. He played hockey and baseball for many years and now still enjoys watching sports to relax.
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