Where is Aruna Shanbaug's culprit Sohan Lal Walmiki?

After 66-year-old nurse Aruna Shanbaug's death, Mumbai police is now searching of her culprit Sohan Lal Walmiki. They even don't know that he is alive or dead? It is well known by everyone that Aruna lived a tragic life after Sohan Lal assaulted her brutally and tried to kill her a with a dog chain at KEM Hospital. She was on bed for 42 years and lived like a dead body. She was in coma since the incident took place. After her tragic life ends, now suddenly the question arises that where is the accused? According to Mumbai's Senior Inspector SS Tondwalkr, Sohan Lal was dead but they don't have any confirmed news for that.