"Innocent until proven guilty" is a great construct in our democracy.
So often complex matters result in a rush to blame rather than a rush to investigate.
That's why protocols are so important with regard to any complexity--complexity at home, in school, at the community level and further.
We can all get caught in the trap of rushing to conclusion too quickly without making due time to figure out a situation--I learned that lesson my first year of teaching when a significant amount of book money was lost, and I later found it buried beneath a drawer. Fortunately I was advised not to blame anyone and I didn't.
It's a good idea to keep files of school issues and incidents. Often what seems like a small issue may get larger, and if you keep a daily log of what happens, then you have that information to refer to as the issue develops.
A bright colleague of mine keeps a small notebook with a page for every child--that's a good way to jot down issues, both challenging and enriching, to reflect on and use as you develop the teaching/learning program.
Working with people can often be complex, and we we have to regard that complexity with good process and protocol so that we result in less blame and more support. Onward.