Angel Maturino Reséndiz, aka The Railroad Killer/The Railway Killer/The Railcar Killer (August 1, 1959 – June 27, 2006), was an itinerant Mexican serial killer responsible for as many as 15 murders across the United States and Mexico during the 1990s. Some also involved sexual assault. He became known as "The Railroad (or Railway) Killer" as most of his crimes were committed near railroads where he had jumped off the trains he was using to travel about the country. On June 21, 1999, he briefly became the 457th fugitive listed by the FBI on its Ten Most Wanted Fugitives list before surrendering to the Texas authorities on July 13. He was 39 years old.

He was executed in the Huntsville Unit in Huntsville, Texas, on June 27, 2006, by lethal injection. In his final statement, Reséndiz said "I want to ask if it is in your heart to forgive me. You don't have to. I know I allowed the Devil to rule my life. I just ask you to forgive me and ask the Lord to forgive me for allowing the devil to deceive me. I thank God for having patience in me. I don't deserve to cause you pain. You do not deserve this. I deserve what I am getting." Reséndiz was pronounced dead at 8:05 p.m. on June 28, 2006.

Three page handwritten letter from Resendiz. Letter is general content and is signed Angel. Origina matching handwritten envelope is included.