Rapper Young Jeezy has pleaded not guilty to charges of possessing the assault rifle believed to be the gun used to kill a record label boss backstage at a concert last week (22Aug14). The 36-year-old MC, real name Jay Jenkins, was arrested on Sunday (24Aug14) during a raid by police officers investigating the fatal shooting, which took place backstage at the rapper's Under the Influence of Music Tour concert with Wiz Khalifa on Friday (22Aug14) in Mountain View, California. Cops suspected the weapon found on Jeezy's tour bus was the same rifle used in the shooting incident, and when no one came forward to claim ownership, the rapper, along with five members of his entourage, were taken into police custody. On Monday (25Aug14), the hip-hop star's bail was set at $1 million (£588,000), and on Tuesday (26Aug14) he pleaded not guilty to possessing an illegal assault weapon in a Newport Beach, California, court. Despite the fact weapons charges have been filed, police have yet to arrest a suspect responsible for the shooting death of 38-year-old record label boss Eric Johnson. Meanwhile, Wiz Khalifa's Under the Influence of Music tour stop in Chula Vista, California on Saturday (23Aug14) was cancelled following the tragedy, and another date scheduled for Michigan State University in East Lansing, Michigan next month (Sep14) has also been axed due to "Michigan State University's review of recent events and assessment of campus concerns".