Clark County Sheriff Joe Lombardo announced the end of the department’s investigation of the October 2017 mass shooting in Las Vegas on Friday. Lombardo told reporters that officials could not determine a “definitive motive” that prompted the massacre.

Clark County Sheriff Joe Lombardo announced the end of the department’s investigation of the October 2017 mass shooting in Las Vegas on Friday. Lombardo told reporters that officials could not determine a “definitive motive” that prompted the massacre.