Every Secret Thing by Laura Lippman

(Synopsis "borrowed" from Barnes and Noble) Two little girls banished from a neighborhood birthday party take a wrong turn down an unfamiliar Baltimore street—and encounter an abandoned stroller with an infant inside. What happens next is shocking and terrible, and three families are irreparably destroyed.

Seven years later, Alice Manning and Ronnie Fuller, now eighteen, are released from "kid prison" to begin their lives over again. But the secrets swirling around the original crime continue to haunt the parents, the lawyers, the police—all the adults in Alice and Ronnie's lives. And now another child has disappeared, under freakishly similar circumstances ...

Another good book by Ms Lippman. Although one of the last chapter gave me nightmares for a couple of nights. And, yes, I am planning to read every single one of her books that I can find at the library.