He is survived by his wife, three daughters and a son.
Singh, who was also Malayalam daily 'Mathrubhumi' director, had been undergoing treatmentfor kidney ailment at a private hospital here for some time.
He breathed his last at around 1.45 PM, said a Public Relations Department statement.
An expert in criminal law, Singh had also served as senior standing counsel of the Central government as Director General of Prosecutions from1991 to 1996, the release said.
He was a recipient of Sree Narayana world conventionand global award, it added.
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