Episode 4 on The Kill File covers the ABC or Double Initial Murders

Sources:

https://www.newsweek.com/double-initial-murders-alphabet-murders-alphabet-killer-rochester-new-york-1844558

https://www.psychologytoday.com/us/blog/the-human-equation/202311/strangulation-sadism-and-closing-in-on-the-alphabet-killer

https://www.oxygen.com/crime-news/alphabet-murders-victims-dna-suspects-rochester-new-york

https://allthatsinteresting.com/alphabet-murders

https://www.democratandchronicle.com/story/news/investigations/2009/03/01/double-initial-murders-remain-mystery-after-35-years-police-still/77384622/