Wisconsin Department of Transportation

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Wisconsin State Patrol memoriam

This site is dedicated to the memory of Wisconsin State Patrol officers who lost their lives in the line of duty.

Trooper Donald D. Pederson

Trooper Donald C. Pederson
Trooper Pederson

Trooper Pederson was killed August 26, 1972 after being shot several times by a disgruntled 16-year old motorist he had cited earlier in the evening following a high speed chase. The youth found Trooper Pederson at around 12:19 a.m. and lured him down the same road he had been cited on. Trooper Pederson advised dispatch that he was responding to an accident. When he got to the location of the stopped vehicle, the youth opened fire on him, hitting him four times. After an extensive manhunt, the youth was arrested and was later convicted and sent to prison. At the time of his death, Trooper Pederson was 31 years old and had been with the Wisconsin State Patrol for 6 years. Before that, he had been a police officer in Rhinelander.

Trooper Gary G. Powless

Trooper Gary G. Powless
Trooper Powless

Trooper Powless was killed May 18, 1980 when his squad car was crushed by a tractor-trailer rig that lost control when its left front tire blew out and skidded across the median. The semi pinned the squad car against the guard rail after hitting it broadside and crushed it beyond recognition. At the time of his death, Trooper Powless was 31 years old and had only been with the Wisconsin State Patrol for one year. He was married with two children.

Trooper Deborah M. McMenamin

Trooper Deborah M. McMenamin
Trooper McMenamin

Trooper McMenamin was killed October 26, 1989 when she was struck by a passing motorist while talking to a motorist she had stopped for a traffic violation. She had talked with the driver and was returning to her squad car when she was hit. Despite the efforts of several officers and nurses who were at the scene, Trooper McMenamin did not survive. She attended the State Patrol Academy in 1985 and started as a trooper in the Waukesha District. She later transferred to the Tomah area and then to the Eau Claire area. Trooper McMenamin was 31 years old at the time of her death. She was married (her husband was an Executive Officer in State Patrol) and had a son from a previous marriage.

Trooper William Schoenberger

Trooper William Schoenberger
Trooper Schoenberger

Trooper Schoenberger died April 22, 1993 from head injuries sustained on April 17, 1993 when his squad car was struck from behind by a semi-tractor trailer. Trooper Schoenberger was on the scene of a car fire at the time and had positioned his car in the traffic lane to protect fire department personnel. Trooper Schoenberger joined the Wisconsin State Patrol in 1984, and spent all of his 8-1/2 years in the Eau Claire and Chippewa Falls area. At the time of his death, he was 31 years old and was married with one daughter.

Trooper Jorge R. Dimas

Trooper Jorge Dimas
Trooper Dimas

Trooper Dimas died June 14, 2009 from injuries sustained on May 9, 2009 when he was in pursuit of a violator and became involved in a traffic crash. Trooper Dimas began his career with the Wisconsin State Patrol July 20, 2008. He graduated as a member of the 57th Recruit Class in December 2008 and accepted his first assignment as a trooper in Polk County. At the time of his death he was 23 years old and had a son.

Trooper Trevor Casper

Trooper Trevor Casper
Trooper Casper

Trooper Trevor Casper was shot and killed on March 24, 2015, in Fond du Lac by a suspect, who was wanted for robbing a bank in Marinette County earlier in the day and subsequently killing a man during his escape. Trooper Casper observed and then followed the suspect’s vehicle, which stopped in a parking lot. The suspect began firing. Both Trooper Casper and the suspect were killed in the exchange of gunfire. As a member of the 60th Recruit Class, Trooper Casper was sworn into the State Patrol in December 2014 and was assigned to the Northeast Region—Fond du Lac Post. At the time of his death, he was 21 years old and was the youngest sworn member of the State Patrol.

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Last modified: April 13, 2015

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