Police detained Vic Mensa on Thursday after suspecting him and his crew stole from Barneys. According to Complex, the rapper went on a shopping spree and dropped $4,000 at the luxury department store. Shortly afterwards, apparently without reason, police accused them of stealing from the store. Mensa took to Snapchat to express his frustration with the officers and he even caught some of the experience on camera. “I’m tired of dealing with these motherf*ckers man,” he said as he showed the police officers. “Over here just giving a nigga trouble for all types of stupid sh*t. We didn’t steal sh*t. I go in Barneys and spend four racks and get…