When Lester Johnson jumped off the Williamsburg Bridge last Wednesday, Marcus wasn’t surprised to learn the bad news. In the immediate aftermath, Marcus was overcome with the usual sadness that accompanies such tragedies, but now, as he stares at the closed casket on display, all he can think about are the difficulties Lester faced for over a decade, ever since Lauren found out about the drugs and the debts and filed for divorce, and he understands that Lester’s…