What are the different types of people who might have seen this fight? (e. g., friends of those involved; people who don’t know the kids who were fighting; those who were fighting; teachers; students) Why would there be different stories of the event if no one is just plain lying?

friends of the people who are fighting, the friends would have different stories sided to the person there friends with because they would be biased to there friend

teachers students, would say what they saw because wouldn't be biased to neither kid since they have no relation

the kids who were fighting, would have there interpretation of the story based off of what they took from it.

Explanation:

there would be different stories based off of what the people just saw and what they knew about why the fight happened. if you didn't know the people who were fighting you might just say what you herd and what you saw. but if you did you might side with one of the people who you are friends with because usually you would be biased to the person.