It is sad to know that under the existing legal system, my friend will go through hell for a long time even though he is the proven victim.
The option of detective wont work because:
1. Detective agencies services could have been the best option had the lid on the issue was not blown open and confronted already.
2. She is alert now, playing safe, and alledges to have severed communication with the unofficial husband aka boyfriend. Therefore, little or no possibility of getting evidence from future misbehaviours.
What are the options for mutual separation with least issues and zero maintenance?