Conversation so far:
What was detection?
CANNOTANSWER.
Are there any other interesting aspects about this article?
case.
Between 17 April 1998, when the police abandoned the investigation, and Shipman's eventual arrest.
What was he being investigated for?
he killed three more people.
His last victim was Kathleen Grundy, who was found dead.

Question: How did he kill them?
Self-contained rewrite: How Shipman kill the victims?