An Army vet who once did time for killing a commanding officer was arrested for a decades-old double murder of two teenage boys in Oregon, officials said. Steven Paul Criss, now 65, allegedly gunned down 16-year-old Donny Bartron and 18-year-old Pete Zito, Jr. in an execution-style shooting in a rec center parking lot in 1974, cops said this week. The boys’ bodies were found the following morning by an Oregonian newspaper delivery driver.