The founder and CEO of Golden Krust Caribbean Bakery & Grill killed himself inside his Bronx factory Saturday, police sources said. Lowell Hawthorne, 57, shot himself inside the Park Ave. building near E. 173rd St. in Claremont about 5:30 p.m., sources said. More than a dozen current and former employees stood in disbelief outside the factory hours later. Some had tears rolling down their cheeks. “He was a good boss, humble and a good businessman,” said Pete Tee, 27, a former employee. “He never seemed sad. This is just terrible news right now.” Hawthorne opened the first Golden Krust store on E. Gun Hill Rd. in 1989.