KENOSHA COUNTY, Wis. (CBS 58) — A former Kenosha County Sheriff's Office deputy has been charged after investigators say he used the county's Flock Safety camera system to track a coworker for an unauthorized personal purpose.

Frank McGrath is charged with two counts of misconduct in public office.

According to the Kenosha County Sheriff's Office, potential misuse of the Flock system was discovered during an internal audit in fall 2025.

An internal investigation found McGrath allegedly used the system to track a coworker for a personal reason unrelated to legitimate law enforcement activity.

McGrath later resigned from the sheriff's office.

Following its internal investigation, the Kenosha County Sheriff's Office referred the case to the Racine County Sheriff's Office for an independent criminal investigation. Racine County investigators later referred their findings to the Kenosha County District Attorney's Office, which filed charges against McGrath.

Following the incident, the sheriff's office said it implemented additional safeguards governing the use of Flock Safety technology.

Those changes include allowing any sworn supervisor to audit Flock activity and individual searches, requiring personnel to document a legitimate law enforcement reason and associated case number before conducting a license plate search and reducing Flock data retention from 30 days to seven days.

All sworn personnel were also required to complete remedial Flock Academy training covering authorized use, department policies, privacy considerations and accountability expectations.

"Flock Safety technology is an important public-safety tool, and its use is limited to legitimate law-enforcement purposes," Kenosha County Sheriff David Zoerner said. "Any misuse of that system is unacceptable. The Kenosha County Sheriff's Office will hold any employee accountable for violating the law, department policy, or the public's trust."

Zoerner said the agency took the allegations seriously and sought an independent review to determine whether criminal conduct occurred.

"In addition, we have strengthened our safeguards, expanded our auditing practices, reduced data retention, and required remedial training for every sworn member of this agency," Zoerner said. "These measures reinforce our commitment to lawful use of this technology and to maintaining the community's trust."

Court records show McGrath is scheduled to make his initial appearance Sept. 17 at 1 p.m.

The investigation remains ongoing.