Thiruvannamalai: District Superintendent of Police Dr. K. Karthikeyan.IPS has started the work of collecting fingerprints and facial recognition for sadhus on the Kriwala route in Tiruvannamalai district. He also initiated the process of issuing Ainu card containing their photograph, fingerprint and Njasu Oulununu and provided them with free telephone numbers and listened to their grievances.