By Express News ServiceCHENNAI: A 65-year-old woman was allegedly stabbed to death by her mentally-ill son in Nolambur on Saturday evening. On Saturday evening, neighbours heard cries from Jayalakshmi’s house. Veeraraghavalu (28), the victim’s son, was present in the room. We have sent a memo to the Kilpauk Mental Health Institute and he will soon be admitted there under police supervision. Jayalakshmi’s elder son who was away at the time has been informed of the death..