Online forums dedicated to true stories or local history might be a good place to search. People often share their own experiences or knowledge about interesting events in their area. You could also try searching on social media platforms, but be aware that the information might not be as reliable. Use keywords like '2 little monsters true story' and see what comes up.
Another option is to contact local newspapers. They might have covered the story in the past, especially if it was something that had an impact on the local community. You can either visit their offices in person or check their online archives. If it was a more widespread story, national newspapers or news websites could also be a source of information.