It seems like a challenging situation with the witness not appearing despite multiple hearings and the police unable to provide information on summons/notice delivery. In such cases, it's crucial to ensure proper documentation of your efforts and to follow legal procedures diligently.
Firstly, ensure you maintain records of all communication, court orders, and responses received from the police through the RTI application. These documents are crucial for demonstrating your efforts in attempting to summon the witness and the lack of cooperation from the police in serving the summons.
Next, it might be prudent to inform the court about the police's response through the RTI application. You could file a petition or application informing the court of the police's inability to find any details regarding the service of summons or notices to the witness and the first informant.
You might also consider requesting the court to take appropriate action against the witness for non-appearance and against the police for their failure to serve the summons effectively. This could involve requesting the court to issue a bailable/non-bailable warrant against the witness for their non-cooperation or directing the police to conduct a thorough investigation into the delivery of summons.
Additionally, consulting with your legal counsel regarding these developments and seeking their advice on the best course of action would be crucial. They can guide you through the legal intricacies, suggest further steps, and represent your interests effectively in court.
Overall, a meticulous approach involving documentation, legal representation, and informing the court about the challenges faced in summoning the witness would be essential in navigating this situation effectively.