The Greater Manchester police have revealed that the man who was found guilty of killing three people in the hospital could still be in the wards of the hospital. The man is accused of contamination of saline solution with insulin and injecting three people who later died in the hospital. A fourth person is critically ill and is receiving treatment in the hospital.

Police investigation has revealed that insulin was found in a batch of 36 saline doses in a storeroom close to Ward A1 of the hospital.

Chris Burke, Chief Executive of the local NHS Trust, said that this is a criminal act. It could never have been anticipated. Mr. Burke also said, “I would understand why patients would be worried about coming into this hospital, but I can say that it is safe, we hope to stop further incidents like this”.

Greater Manchester Assistant Chief Constable, Ian Hopkins said that their team is investigating the hospital to find out the killer. Their investigation team now includes 60 detectives.

James Catania, Medical Director at Stepping Hill, said insulin was always kept in a refrigerator in a locked room and saline solutions are also locked now.