Friday, July 18, 2025

Waukesha County Sheriff's Detective Joseph Mensah Has Resigned, Effective July 31, 2025, Resignation Letter To Sheriff Eric Severson Says

Mensah submitted his resignation from the Waukesha County Sheriff's Office, effective the end of July.

By H. Nelson Goodson 
Hispanic News Network U.S.A.

July 18, 2025

Waukesha, Wisconsin - On Thursday, Waukesha County Sheriff's Detective Joseph Mensah, 35, submitted his resignation, effective July 31, 2025 to the Waukesha County Sheriff's Office. Mensah was hired as a Waukesha County Sheriff's deputy in January 2021.

Mensah says he is transitioning out of law enforcement due to family and personal reasons. 

In March 2025, Mensah's federal lawsuit civil trial ended in a hung jury. The family of Alvin Cole, one of Mensah's victims filed a federal civil rights lawsuit against Mensah claiming excessive force.

The Cole and Anderson families have ongoing federal civil rights cases against Mensah.

In July 2021, Milwaukee County Circuit Court Judge Glen H. Yamahiro found probable cause to criminally charge Mensah, a Waukesha County Sheriff's deputy and former Wauwatosa police officer with a homicide charge for the June 16, 2016 murder of Jay Anderson Jr. in Wauwatosa.

Mensah resigned from the Wauwatosa Police Department after being involved with three homicides within a five-year duty span. 

According to the Milwaukee Police Department investigation, then Wauwatosa Police Officer Mensah went to Madison Park in regards to an after-hour loitering violation. Mensah who wasn't wearing a body video camera at the time claimed that Anderson reached for a handgun next to him and that he feared for his life and fired multiple shots striking Anderson five times in the head and another shot in the upper right shoulder. The police investigation result indicated that Mensah was justified in Anderson's homicide, according to the Milwaukee Police investigation report.

Mensah was also declared justified in the shooting deaths of Alvin Cole, 17, on February 2, 2020 at the Mayfair Mall parking lot and Antonio Gonzales, 29, on July 2015 for wielding a decorative sword.


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