Professors are unfortunately all too quick to accuse a student of an academic misconduct charge because they simply may not understand or approve of what the student submitted. For example, like with a lab report, if it does not meet the professor's expectations, the professor could naturally assume that the student did something wrong.
To go further with that analogy, even doing very well on an exam or an assignment, a professor can assume the worst and believe that the student did something improper rather than just doing very well on an exam. With a lab report, if you have the data that would certainly support your results, that's incredibly important, but you have to understand that the professor, the school, the conduct office, whomever may be involved, they're not necessarily going to do the right thing.
Before you engage with the school in any capacity, you do have to take the necessary precautions, you have to have the necessary perspective response prepared so that you could follow up accordingly. Having an experienced academic misconduct attorney advisor is going to be your best ally. They can help you understand and navigate the process and they should be involved from as early as possible in an academic misconduct case.