Nurse Arrested over Hospital Deaths

The transcript discusses a serious incident at Stafford Stepping Hill Hospital involving the arrest of a nurse, Becky Leighton, on suspicion of murder. The investigation focuses on the alleged poisoning of patients with insulin-laced saline, affecting 14 patients and resulting in three deaths. Despite an arrest, police continue their inquiry, emphasizing the need for hospital staff to work in pairs and monitor drug supplies. The investigation explores whether the contamination was an act of a single individual or involved others, with insulin being a controlled substance stored securely. The situation raises concerns about hospital security and the trust placed in medical professionals.

What measures have been implemented at the hospital to ensure safety after the incident?

What is the key question detectives are trying to answer regarding the poisoning?