Who are the suspects in the book shelter by harlan coben?

In "Shelter" by Harlan Coben, the main suspects surrounding the mysterious disappearance of the protagonist's friend, Ashley, include a group of bullies, a mysterious figure known as the "Reverend," and individuals with connections to a secretive organization. As the story unfolds, the protagonist, Mickey Bolitar, navigates a web of deceit and danger while uncovering hidden truths about those around him. The suspense builds as Mickey learns that not everyone is who they seem, complicating his search for answers.