DAVID LE/Staff photo. 7/3/15. Staff Sgt. Justin Coletti and his sister Olivia, pet Coletti's old service dog Dasty. Staff Sgt. Justin Coletti, of Peabody, is an Army veteran who was wounded in Afghanistan. When Coletti and his service dog Dasty were both injured, they were separated and now Dasty works for the Sheriff's Department in North Carolina.