CHIPPEWA COUNTY, MI — Tanner Dunbar Harrison received a minimum 60-year prison sentence this week for the death of Katie Robinson, who died when Harrison intentionally rear-ended her vehicle during a high-speed police chase on June 17, 2021.
Harrison was convicted of second-degree murder on January 16 following a five-day jury trial in the 50th Circuit Court. The jury reviewed 33 exhibits and heard testimony from 31 witnesses before reaching a guilty verdict.
The incident began with a reckless driving complaint that escalated into a high-speed pursuit through Chippewa County and Sault Ste. Marie. Prosecutors said Harrison drove at excessive speeds, forced vehicles off the road, and endangered multiple motorists. The chase ended on Ashmun Street, where Harrison struck Robinson’s car from behind. Robinson, who had just left work, died at the scene. Harrison’s vehicle then collided with a parked car and ultimately crashed into the Great Lakes Recovery Center.
At sentencing, Chief Assistant Prosecutor Kristin Giommi highlighted that Harrison was on bond for three separate charges at the time: possession of a firearm while under the influence, domestic violence, and carrying a concealed weapon. Harrison is also a fourth habitual offender with a long criminal history. Giommi described Robinson as a young woman dedicated to her community and advocacy for female athletics, emphasizing the devastating impact of her loss on her family.
Judge James P. Lambros called the events “horrific” and said there was no doubt Harrison intended to cause harm. The trial faced delays after Harrison was initially found incompetent to stand trial due to crash-related injuries and had relocated to Virginia. Authorities conducted surveillance and interviews before determining Harrison had regained competency, allowing prosecutors to proceed with the murder charge and extradition.
“This sentence reflects the seriousness of the defendant’s actions and the devastating loss suffered by Katie Robinson’s family and the community,” said Prosecutor Robert L. Stratton. Harrison will not be eligible for release until he serves at least 60 years in prison.
The Chippewa County Sheriff’s Office was credited for its thorough investigation leading to the conviction.