Podcasts as inspiration - True Crime Bulls**t

The popularity of true crime podcasts makes them a great source of inspiration for your book displays. Pick a few or more and pair them with books or movies with similar themes, subjects, or tones. Because book displays are passive readers advisory, we don't have the conversations with patrons that we would normally have to learn what they loved about the podcasts. By broadly interpreting what a read alike is, there is a better chance of catching what it is they love. 

I'll pick one podcast to use as an example. True Crime Bullshit  is hosted by Josh Hallmark on the Our Americana Network. TCBS is a serialized investigation into the life and crimes of serial killer Israel Keyes. (Of it's four seasons, three have focused on Keyes. The third season told the story of another serial killer.) Hallmark is a compelling narrator who focuses on telling a story about people: Keyes, his victims, and his friends and family. The story can seem intimate and personal at times. The listener feels as if they are following Hallmark on his journey and joining him in obsession about the case, possible, victims, and new clues. 

To get a sense of the podcast, as well as a similar one about a missing college student, Maura Murray, check out "Serial killers, brutal murder and the rise of the podcast detectives" by Clémence Michallon, The Independent,  12.13.20

Similar titles I would put on a book display:
I'll Be Gone in the Dark: One Woman's Obsessive Search for the Golden State Killer by Michelle McNamara.
The late author takes her readers on her search for a then-unknown murderer and rapist who terrorised Californians for ten years. It's a mix of memoir and reporting that mirrors TCBS in a lot of ways. Both authors take pains to remember the victims lost, telling their stories, while still bringing their audience along as they dive deeper and deeper into a case. 
More: "Michelle McNamara hunted, and was haunted by, the Golden State Killer" by Alexandra Alter, The New York Times,  2.15.18

In Cold Blood by Truman Capote is the classic of the genre. His story switches between the victims, their friends and neighbors, and the murderers. Capote is an additional character in his story. 

More: "In Cold Blood, half a century on" by Ed Pilkington, The Guardian, 11.15.2009

My Dark Places: an L.A. Crime Memoir by James Ellroy is the novelist's telling of his own mother's unsolved murder, how it impacted his life, as well as his consuming search for her killer. While he investigates the case with a retired detective, Ellroy learns more about his secretive mother and her life. 
More: "Murder close to the heart" by Evan Roth, The Washington Post, 5.23.1995

A different sort of book with a similar deep dive into one case with a compelling narrative, and a sense of the very human tragedy in a murder would be Say Nothing: a True Story of Murder and Memory in Northern Ireland by Patrick Radden Keefe. This book uses the abduction and murder of a single mother to tell the tragedy of the conflict in Northern Ireland. The stories of individual members of the IRA including Gerry Adams and the murdered woman, Jean McConville, and her family drive a compelling tale of political murder and those left behind. 

More: "How Conflicts End—And Who Can End Them" by David A. Graham, The Atlantic, 3.3.2019

The most recent book written about Israel Keyes specifically is American Predator: The Hunt for the Most Meticulous Serial Killer of the 21st Century by Maureen Callahan. Fans of TCBS have been critical of the book but your patrons could be interested. 

You can fill in the display with titles about serial killers like Ted Bundy as well as novels with a similar theme and tone to the books listed above. While I don't know your collection, some ideas can be found in these lists: 

100 MUST READ BOOKS ABOUT SERIAL KILLERS/Book Riot

Sarah Nicolas, May 25, 2017

TOP TEN SERIAL KILLER NOVELS/The Strand Magazine
Elizabeth Heiter, January 4, 2016

The Best True Crime Books About Serial Killers/Novel Suspects
Greta Shull