It only took the dog seven seconds to pull the wanted man out of the trunk of the car.
It reportedly started as a traffic stop around midnight Wednesday.
The driver, Sarah Palmersheim, pulled into a parking lot and then drove off.
According to WISN, Palmersheim said her boyfriend, Jeffrey Brown was hiding in the trunk of her car. Brown had a warrant out for his arrest.
Police ordered Brown out of the vehicle multiple times, but he refused. They eventually used a key fob to open the trunk, only for Brown to reportedly close it from the inside.
On their second attempt to open the trunk, police let the K-9 at Brown. The K-9 held it's grip on Brown while officers put him in cuffs.
Before arresting him, police found a bag of fentanyl in Brown's pocket.