Don't look up childhood friends, unless you're sure you want to know

Douglas Preston's search for a boyhood friend led to a dark discovery.
He fled from any hint of conflict, usually with a wiseass comment flung over his shoulder, and he could outrun any goofus who took up the chase. I couldn't begin to fathom the trajectory that brought him from an upper-upper-middle-class home in Wellesley to a cramped boarding house in New Jersey. Details of his life came flickering back into my memory: Petey singing songs to his hamster Gertrude; Petey cradling his dying dog after she'd been hit by a car, even though she was bleeding and peeing all over him; Petey writing silly stories about a magical valley where the animals talked like people; Petey and I burying a treasure.
It's better to know, because you never know who might not.