A witness and an alibi suggest Merritt may be innocent of the murders.
Chase Merritt stands trial for his life in the murder of the McStay family.
Police look at suspects, and video of a truck may reveal the killer.
Police trace Merritt's phone to the graves, and a lawyer leaves the trial.
The defense detects new DNA in the graves, and a key suspect goes missing.
Tension builds as everyone awaits the verdict, and a new suspect surfaces.
Merritt claims new proof confirms his innocence, and a key figure emerges.