Why did James not bother to find Dee-Dee?

In 1992, James stood in front of the synagogue in Suffolk, contemplating the fact that his blood ran through this place. Hudis Shilsky, he discovered, was buried in a Long Island graveyard. Sam Shilsky had died in 1944 while in the service. He traced the Rabbi to a Brooklyn address in the 1960s, but, after that, he had vanished. Dee-Dee had also vanished from Suffolk; she withdrew from school one semester short of graduating, just before Mameh's death. James knew he could probably find her, but didn't have the heart to reopen old wounds.