The Polk County Sheriff's Office says it's investigating after Bartow police shot an armed carjacker Monday afternoon on U.S. 98. Sheriff Grady Judd said 32-year-old Joshua Walker had been in a fight with his mom at their Highlands City home before he asked her to borrow her car. When she refused, Walker pointed a gun at his head and said he would "do suicide by cop" and drove off, according to the sheriff. Judd said Walker then went to a liquor store around 3:45 p.m. carjacked a woman sitting in the parking lot and fled south on U.S. 98. MORE: https://www.wtsp.com/article/news/local/polkcounty/bartow-police-shooting-suspect-polk-county-investigation/67-a2aec48a-3f78-4f1a-a9c5-9d9c9cd5912e ►Subscribe: https://on.wtsp.com/youtube ►Website: https://www.wtsp.com/ ►Facebook: https://facebook.com/10TampaBay ►Twitter: https://twitter.com/10TampaBay