Command Staff Biographies and Contact Information

Chief of Police

Jim Gunther
Phone: 630-981-6341
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Chief Jim Gunther began his law enforcement career as a patrolman with the Westmont Police Department in 1997. In 2000, he was assigned to the investigations division as a detective and additionally assigned to the Felony Investigative Assistance Team (FIAT) Major Crimes Unit, a multi-jurisdictional task force in DuPage County. He was promoted to the rank of sergeant in October 2006, and spent the next year as a patrol shift supervisor. In December 2007, he was assigned as the Investigations Division Supervisor. He was appointed as deputy chief of police by Chief Thomas R. Mulhearn in March 2010. As deputy chief, he oversaw the police department’s operations functions including the patrol and investigations divisions and was a member of the DuPage Incident Management Assistance Team (IMAT). He was promoted to the rank of Chief of Police in September 2016.

Chief Gunther holds certifications as a juvenile officer, firearms instructor, Taser instructor, judgmental use of force instructor, recruitment team member, lead homicide investigator, bike patrol officer and member of the police department’s honor guard. Since 1999, Chief Gunther has presented instruction to the Westmont Police Department Citizens’ Police Academy classes on topics including identity theft, traffic stops, homicide investigation, and statement analysis.

Chief Gunther is a graduate of Harper Community College A.A. 1992, Western Illinois University B.A. 1994 and Lewis University M.S. 2003. In 2011, Chief Gunther graduated from the 244th session of the Federal Bureau of Investigation National Academy in Quantico, Virginia, and the Senior Institute Management for Police (SMIP) Session #71, a program of the Police Executive Research Forum (PERF) that provides senior police executives with intensive training in the latest management concepts and practices used in business and government.

Chief Gunther serves as the President of the DuPage County Chiefs of Police Association, Chairman of the MERIT multi-jurisdictional task force covering all of DuPage County and Executive Board member of the DuPage County Metropolitan Enforcement Group (DuMEG).

Chief Gunther is currently a member of the Illinois Association of Chiefs of Police, the International Association of Chiefs of Police, and the Federal Bureau of Investigation National Academy Association.

Deputy Chief of Administration 

Brian Gruen
Phone: 630-981-6340
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Deputy Chief Gruen began his law enforcement career as a patrolman with the Westmont Police Department in 2001. In 2006, he was assigned to the investigations division as a detective and additionally assigned to the Felony Investigative Assistance Team (FIAT) Major Crimes Unit, a multi-jurisdictional task force in DuPage County. He was promoted to the rank of sergeant in 2010, and spent the next year as a patrol shift supervisor. In 2011, he was assigned as the operations sergeant. He was appointed as deputy chief of police in October 2016. He served as the deputy chief of operations till January 2021.  

Deputy Chief Gruen’s main responsibilities include supervision of the administrative sergeant, records, training, and detective divisions as well as preparation and monitoring of the police department budget. He is a member of the DuPage County Incident Management Assistance Team (IMAT). He previously served as the Commander of the ILEAS Region 4 North Mobile Field Force.  Deputy Chief Gruen is currently a member of the DuPage County Chiefs of Police Association, Illinois Association of Chiefs of Police and the International Association of Chiefs of Police.

Deputy Chief Gruen has completed the School of Police Staff and Command through the Northwestern University Center for Public Safety.

Deputy Chief of Operations 

Stephen Thompson
Phone: 630-981-6371
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Deputy Chief Thompson has served with the Westmont Police Department since 2002. He was promoted to the rank of sergeant in 2008. Prior to being appointed as a deputy chief in October 2017, he served as a patrol sergeant from 2008 to 2011 and as detective sergeant from 2012-2017. He also served as a team leader for the Felony Investigative Assistance Team (FIAT) Major Case Unit.

Deputy Chief Thompson’s main responsibilities include supervision of the operations sergeant, patrol sergeants, and the patrol division. He is a member of the DuPage County Incident Management Assistance Team (IMAT), DuPage County Chiefs of Police Association, Illinois Association of Chiefs of Police and the International Association of Chiefs of Police. 

Deputy Chief Thompson is a graduate of Western Illinois University and has completed the School of Police Staff and Command through the Northwestern University Center for Public Safety.

Administrative Sergeant 

Michael Weibler
Phone: 630-981-6373
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Sergeant Michael Weibler has served with the Westmont Police Department since 2001. From 2012 until his promotion to sergeant in 2015, he served as the school resource officer and juvenile detective.

Sergeant Weibler is currently the Administrative Sergeant and is responsible for the department’s scheduling, training, policy and oversees the records division. Sergeant Weibler is chairman of the awards committee and rangemaster in charge of department firearm instruction.  Additionally, he is the liaison for creating and coordinating our department's Special Olympics of Illinois fundraisers. 

Sergeant Weibler is a graduate of the School of Police Staff and Command (2020) and the Executive Management Program (2022) through the Northwestern University Center for Public Safety. He was a past board member of the DuPage Juvenile Officers Association and was the proud recipient of the Public Safety Officer of the Year award in 2017.

Operations Sergeant

Anthony Rainaldi
Phone: 630-981-6361
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Sergeant Anthony Rainaldi has served with the Westmont Police Department since 2000. From 2008 until 2014, he was assigned to the investigations division as a detective. Sergeant Rainaldi returned to the patrol division in 2015 and was promoted to the rank of sergeant in 2017.

Sergeant Rainaldi is currently assigned to the patrol division as the relief sergeant. His duties include the daily operation of his patrol personnel in the absence of the assigned patrol sergeant. Additionally, Sergeant Rainaldi serves as a range instructor.

Sergeant Rainaldi is a graduate of Western Illinois University where he received a Bachelor of Science degree in Law Enforcement Justice Administration.   In 2021, he completed the School of Police Staff and Command through the Northwestern University Center for Public Safety.

Detective Sergeant 

Rolando Padilla
Phone: 630-981-6376
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Detective Sergeant Rolando Padilla has served with the Westmont Police Department since 2008.  From 2014 to 2016, he was assigned to the investigations division as a detective. He was promoted to the rank of sergeant in 2017 and served as a patrol supervisor until December of 2022.  

Detective Sergeant Padilla is currently assigned to the investigations division as a supervisor. His current responsibilities include supervision of the investigations division, evidence room, and crime scene technicians.  He also oversees the department's defensive tactics and taser Program.  Detective Sergeant Padilla also serves as a firearms instructor, use of force Instructor, and is a member of the honor guard.   In 2019, Detective Sergeant Padilla completed the School of Police Staff and Command through the Northwestern University Center for Public Safety. 

Prior to becoming a police officer, Detective Sergeant Padilla served in the Illinois Army National Guard and is a veteran of Operation Iraqi Freedom.

Patrol Sergeant 

Timothy Radtke
Phone: 630-981-6360
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Sergeant Radtke has served with the Westmont Police Department since 1998. Sergeant Radtke was selected as a Field Training Officer in 2002 to help train new officers with the Westmont Police Department. From 2006 to 2013, he was assigned to investigations as a detective. He was also assigned to the DuPage Felony Investigative Assistance Team (FIAT) Major Crimes Unit. He was promoted to the rank of sergeant in 2016 and served as detective sergeant from 2017-2022. Sergeant Radtke was assigned to the Metropolitan Emergency Response and Investigations Team (MERIT) Major Crimes Unit and the Public Integrity Team which investigates officer-involved shootings. Sergeant Radtke served as an assistant commander for the MERIT Major Crimes Unit.

Sergeant Radtke is a graduate of Lewis University and has completed the School of Police Staff and Command through the Northwestern University Center for Public Safety.

Patrol Sergeant 

Jeffrey Borgardt
Phone: 630-981-6320
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Sergeant Jeffrey Borgardt has served with the Westmont Police Department since 2004. From 2011 to 2016, he was assigned to the investigations division as a detective. He was promoted to the rank of sergeant in 2016.

Sergeant Borgardt is currently assigned to the patrol division on the midnight shift and also oversees the bike patrol unit. Additionally, he serves as a firearms instructor, a crime scene technician, and is a member of the honor guard.

Sergeant Borgardt was the recipient of the Public Safety Officer of the Year in 2012. He completed the School of Police Staff and Command through the Northwestern University Center for Public Safety in 2018.

Patrol Sergeant 

Scott Bukovic
Phone: 630-981-6325
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Sergeant Scott Bukovic first served as a police officer with the Westmont Police Department from 1996 to 2002 and returned in 2005. From 2013 until his promotion to sergeant in 2017, he was assigned to the investigations division as a detective and was also assigned to the DuPage Felony Investigative Assistance Team (FIAT) Major Crimes Unit.

Sergeant Bukovic is currently assigned to the patrol division, where he oversees the daily operation of his patrol personnel. Additionally, he serves as crime scene technician (CST) and is the speed measuring device operator instructor for the department.

Prior to becoming a police officer, Sergeant Bukovic served in the United States Army as a Military Police Officer. 

Patrol Sergeant

Douglas Mantooth
Phone: 630-981-6352
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Sergeant Douglas Mantooth has served with the Westmont Police Department since 2005.  He worked as a police dispatch for six years prior to becoming a police officer. Sergeant Mantooth was assigned to the patrol division from 2005 to 2020.  

In 2021, Sergeant Mantooth was promoted to the rank of sergeant. He has also been a member of the Bike Unit since 2006, and was the Bike Unit Coordinator from 2007 until 2017. Additionally, Sergeant Mantooth serves as a member of the Honor Guard and a Field Training Officer. He has received numerous commendation letters from AAIM, the Alliance Against Intoxicated Motorists, for his enforcement against drunk drivers.

Sergeant Mantooth is currently assigned to the patrol division as the relief sergeant.  His duties include the daily operation of patrol personnel in the absence of the assigned patrol sergeant.

Sergeant Mantooth is a graduate of DeVry University where he received a Bachelor of Science degree in Computer Science. 

Patrol Sergeant

Kristina Dominguez
Phone: 630-981-6377
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Sergeant Kristina Dominguez has served with the Westmont Police Department since 2009. From 2020 until she was promoted to sergeant in 2022, she was assigned to the investigations division as a Task Force Officer for the Drug Enforcement Administration (DEA).

Sergeant Dominguez is currently assigned to the patrol division where she supervises and participates in all facets of patrol operations. Additionally, she is certified as a crime scene technician, bicycle officer, and serves as a member of the recruitment team.

Prior to serving with the Westmont Police Department, Sergeant Dominguez served with the Bridgeview Police Department as a police officer from 2006 until 2009.