Emergency murder -- Shirley (by Janet McGiffin)

Shirley worked at Mercy Hopital as the emergency room nurse. Shirley was a big woman who could handle any kind of trouble. Because of she is strong, she would be helpful. She helped Maxine to take care of every patient in emergency room. she worked hard, and she assisted Dr. Maxine so often.
One night, Nanette who looked very sick came into that hospital and she died very soon. Shirley felt strange of Nanette's wearing because she never dressed like that. After Shirley and Maxine knew that Nanette died from posion which called tetrodotoxin. So shirley and Maxine tried to find out who is the murder