Not likely. Usually, such names in stories are made up for entertainment purposes and not drawn from real-life events. So, I'd say it's not based on a true story.
Well, Killerman is not a true story. It's a work of fiction that the creators came up with to engage and thrill the audience. There's no real-life basis for it.
Killerman is not based on a true story. It's a work of fiction that likely drew inspiration from various elements but has no direct connection to actual happenings.
Since I don't have much information about this Frank Killerman, it could be that he is an ordinary person with a story that has not been widely publicized. Maybe he is a local hero in his town, someone who has made a difference in the lives of a few people around him, like helping out at a community center or being a kind neighbor who always lends a hand. Without more details, it's hard to tell the exact real story.