Eight days later, he was told that an autopsy by the hospital had already found 13 times the normal concentration of the same heart drug in another dead baby. The medication had not been subject to any security measures. Police were called in and began to search staff lockers when another baby died from digoxin poisoning on 22 March 1981. Examination of work logs and other nurses' subjective impression that a colleague had inappropriate reactions to the deaths led to the arrest and charging with murder of a nurse, who was released on bail.