From my experience I use 7 house ruler for the missing person if you are not in relation with him. So, missing person is represent with Jupiter in its own sign and triplicity so missing person is fine. Jupiter did not have separate aspect with Venus/part of death another testimony missing person is fine. As ruler is in Sagitarius and in derivate 9 house might be missing person went to another town or country to watch some sport event. Or might be that missing person went to some church or convent, or college and university.