A call about a neighborhood prowler leads Detective Sheehan to revive an unsolved missing person's case amid increased community pressure.

Mare visits a grisly murder scene before informing the victim's enraged father; a video from the night of the crime surfaces,

As Mare and Colin parse new physical evidence, phone records lead to an unlikely suspect.

An anonymous call gives Dawn hope.

Lori tries to get to the bottom of her son's outburst.

After a heroic rescue lands her in the hospital, Mare awakes to the unshakeable pain of losing a friend.