As we don't have more information about this 'victim of the night' true story, the main character could be a person who was in the wrong place at the wrong time at night. It might be a hard - working individual who was on their way home from a late - shift job and became the victim of an unforeseen event. Or it could be a young person out for a night of fun who unfortunately ended up in a bad situation.
Without more details about the 'victim of the night' true story, it's impossible to determine the main character precisely. However, it could be someone who had a regular life during the day but then became a victim at night. For example, it could be a shopkeeper who closes up late and then is targeted on their way home. Or it could be a homeless person who is more vulnerable at night and becomes the victim of an act of violence or theft.