Jaime Milla had a cameo as the homeless individual being poisoned in the street. She also played the small part of a wiggling the nail through the door crack in an escape attempt.
The original script has Albert Snyder buying rat poison at a store that contained strychnine but was later replaced by a scene where Albert gets poison from Syd, who was later cut out for the final version. Charles Lynch, the actor who plays Syd, is still credited in the film. While premiering at the Arivaca Film Festival, the extended version of the film showed Charles' scenes intact.
The film contains no guns. The director considers guns and gun centralized films are boring since they're utilized in many independent films and no longer has much merit to an audience. The director prefers knives, stabbing objects, slow deaths and poison instead.
The film was shot on a shoestring budget: the entire film was shot on a Canon T5i. The majority of the crew on any scene was no more than three. The sound came directly from a field recorder's internal microphones handheld by Jaime Milla or on a tripod when Milla wasn't available. The actors never rehearsed together until several minutes before shooting each scene. The roses used in the funeral scene were from the director's rose bushes. The IDs Snyder steals throughout the film are the same, with Milla's and the director's IDs in the pile. Most of the shooting was done at night or on weekends. The syringe used was taken from a hospital visit. The oranges used as props were actually set snacks for the actors. Adam Ray didn't use a clap board, instead he either clapped with his hands or snapped his fingers in front of the camera to slate each shot. All the costumes except the coat Olivia is wearing during the funeral is secondhand. Most of the wardrobe was provided by the cast itself. Two times the production had multiple people playing different roles: Jaime Milla playing the homeless man and the person being robbed while Caitlin Singer is robbed and attends the funeral. Some of those scenes were cut in the final version of the film.
Mr. Snyder is a callback to several films and plays that are dear to Adam Ray. The overall film relates to the play Arsenic and Old Lace, where a man's eccentric aunts use poison to kill people and alter identities. In Pulp Fiction the opening of the film is a title card of a word's definition and follows the dreary process of characters committing crimes. In The Godfather, Francis Coppola used oranges as a symbolic item for predicting death or disaster. In the voicemail voice over, the message mentions the Law Office of Ridgway and Associates. Gary Ridgway was known to authorities as the Green River Killer, a serial killer who killed 42 people and was taken down by aid of the psychological analysis of Ted Bundy. Gary Ridgway's case inspiring Thomas Harris to write the novel Silence of the Lambs, which would later become an Oscar winning film by the late Jonathan Demme.