LAS VEGAS—A convenience store clerk who killed himself minutes after he shot a customer who refused to wear a mask and walked out without paying for three bags of chips earlier this month would have faced criminal charges if he had survived, a police report says. The Feb. 6 shootings on the northwest edge of Las Vegas came four days before Gov. Steve Sisolak lifted Nevada’s COVID-19 mask mandate. The 36-year-old cashier at the Terrible’s gas station/store was pronounced dead at the scene because of a self-inflicted gunshot wound to the head, police said. The 26-year-old customer’s ex-girlfriend took him to a nearby hospital, where he was treated for a gunshot wound to the shoulder and later released, police said. Officers interviewed him at the hospital, and a witness at the scene corroborated his account of the incident. Police were called to the scene at West Centennial Center Boulevard near …