Watch Investigation 13 (2019) HD Full Movie Free on solarmovie.do. Watch Investigation 13 (2019) online free. A group of college science students investigate the urban legend of The Mole Man, an ex-patient said...A group of college science students investigate the urban legend of The Mole Man, an ex-patient said to still be residing within the walls of the Black Grove Asylum and the cause of the disappearances of those who enter.