Though the Wheelers claimed never to have been to Harmony, they seemed to be quite familiar with the town and its residents. Luis in particular began to suspect that "Bob Wheeler" was his long lost father, Martin Fitzgerald, which was ultimately confirmed via a DNA test. When confronted with the evidence, Luis was able to get Bob to confess that he was indeed Martin, but Martin refused to divulge his exact reasons for leaving. He claimed that it was to protect his family.