This thread is a trip!
Brad, I have just a variation to use with the police in your area. Call and ask to speak to the records department. Then give them the dates and see if they will do a record search for you. Your mom called, so there could be a record of that and any other calls. If they find anything, they may charge you per page for copies.
I would also also find out who the mayor, city council members, and/or chief of police for the town where the movie was supposedly filmed and try to track them down and ask about it. If there was a movie involving such effects, surely the city officials would remember. I’d, also, try the county officials if the city couldn’t help.
Good luck. I hope you can come back with some answers.