A Sunday school teacher is shot through her kitchen window; evidence and anonymous handwritten letters lead police in the wrong direction.

A mother is killed in her bedroom, and her teenage daughter confesses to the crime.

24-year-old Vietnamese-American Thien Minh Ly is found stabbed on the Tustin High School tennis courts. There is almost no evidence, and the case runs cold. Until detectives catch wind of a letter revealing the shocking truth.

27-year-old Jarrod Davidson is shot dead outside his apartment in Santa Barbara, California. Next to him is a suspicious potted plant. He was in the middle of a nasty custody dispute but the DNA doesn’t match his ex-wife. So who killed him?

A millionaire is shot to death in his mansion; it takes detectives 15 years to break the case.

A 31-year-old woman named Julie Keown dies of antifreeze poisoning in Waltham, Massachusetts. Detectives rule out suicide and accidental ingestion. Then, after untangling a web of lies, they turn to her husband, James, a popular radio host.