(Lake Mills) The FBI is now involved in tracking down a suspect in a series of Culver’s drive thru robberies throughout southern Wisconsin, including one in Jefferson County. The suspect’s spree began in September, with a series of hold ups and attempted hold ups at Culver’s drive thru locations in Janesville, Beloit, Lake Mills and Mequon. The suspect drives a reddish Jeep Wrangler and he’s not just partial to Culver’s. Police in Janesville say this same guy is the suspect in an armed robbery at a Best Buy earlier this week. In this heist, he pulled a gun while in the prior hold ups he implies he has a weapon.