The sisters of businessman Kamalkant Shah, who was allegedly killed by his wife Kajal and her lover, want their mother’s death to be probed, too. They have revealed how Kajal’s behaviour changed after Kamalkant found out about her affair, and said that when their mother was in hospital before she died, she kept tabs on every update about her. The police are already probing their mother’s death, as they suspect she was also poisoned.

Shah died on September 19 at the Bombay Hospital. A metal blood test showed 350 per cent more than normal levels of arsenic and thallium in his blood. His mother Sarladevi Kapoorchand Shah, who died earlier in August, also showed symptoms of food poisoning. The Crime Branch officials told mid-day that more people are suspected to be involved in the murder. They said it wouldn’t be possible for Kajal and Hitesh to have known about arsenic and thallium or to have procured them by themselves. A Crime Branch source also said they have approached the Kokilaben Hospital seeking to know if they have a sample of Sarladevi’s blood. If they have it, it can be tested to check if it contains the same chemicals as those used to kill Kamalkant.