A 37-year-old Walpole Island woman was arrested after Chatham-Kent police were called for an impaired driving complaint.
Police got the call at 7 a.m. on Sunday. Officers intercepted the vehicle and investigated the driver.
The driver allegedly showed signs of impairment and was arrested. Police say brass knuckles were found during a search.
The woman was transported to police headquarters for breath testing.
The woman has been charged with impaired driving, having a blood alcohol concentration over the legal limit and possession of a weapon.