Ontario's Special Investigations Unit is investigating the arrest of a cyclist by Toronto Police Service officers on Sunday [1].

The probe focuses on whether police used excessive force during the encounter. The investigation comes as legal representatives for the cyclist allege the officers' actions led to serious physical trauma.

According to the cyclist's lawyer, David Shellnutt, officers tackled the man off his bike during the incident [1]. The encounter occurred on the weekend of June 2, 2026 [2].

Medical reports indicate the cyclist was diagnosed with a concussion [1]. Shellnutt said the victim suffered this brain injury, along with other unspecified injuries, as a result of the tackle [3].

The Special Investigations Unit, known as the SIU, is the civilian agency responsible for investigating incidents involving police and public peace officers that result in serious injury, death, or allegations of sexual assault. The agency's involvement indicates that the injuries sustained by the cyclist meet the threshold for a mandatory independent probe [1].

Toronto Police Service officers are now subject to the SIU's review to determine if the level of force used during the arrest was justified. The agency will examine the circumstances leading up to the tackle and the subsequent medical outcome for the cyclist [2].

Shellnutt continues to represent the cyclist as the investigation proceeds. The SIU has not yet released a final determination regarding the conduct of the officers involved [3].

The SIU will investigate an arrest in which Toronto police officers tackled a cyclist off his bike.

This investigation highlights the ongoing scrutiny of police tactics and the use of force in Toronto. By involving the SIU, the case moves from an internal police review to an independent civilian oversight process, which is the standard mechanism in Ontario for ensuring accountability when an arrest results in serious bodily harm.