What to Watch on Tuesday: Season ender for ‘I Am Homicide,’ new Princess Diana special

I Am Homicide (10 p.m., Investigation Discovery) – In the Season 2 finale episode called “Two Sides of Charlotte,” Det. Garry McFadden recalls a case in which the serenity of an “old money” neighborhood is shattered when an elderly resident is attacked and killed while coming home from church.

Also on tonight . . .

Diana: Her Story (8 p.m., UNC-TV) – Rare video and interviews reveal an open and candid look at the life of Princess Diana, including her marriage to Prince Charles.

Shooter (10 p.m., USA) – Bob Lee tracks Molotov’s money and goes up against a Mexican cartel.

The Murder of Laci Peterson (10 p.m., A&E) – The appearance of Scott Peterson’s girlfriend, Amber Frey, increases media attention on the case.

American Ripper (10 p.m., History) – A trove of artifacts contains an unexpected link to the UK.