Don’t listen to any smart legal mumbo…. If you have apprehension that your girl has symptoms of depression and suicides then stay away if you don’t understand how to handle. Evidence or not if you are connected with her as in anyway and FIR filed then remember the system is rihged and they don’t care, unko paisa banane ko milega.
In such cases police writes FIR without any material just on conjecture and summaries. Once FIR is longed then you will be rope into process to run to safe yourself which will cost lot of time, money or energy.
Therefore long story shot your collected evidence means shit. Yeah for trial maybe helpful but by that time it would all be too late.