Conversation so far:
What caused Harold Shipman's death?
Shipman hanged himself in his cell at Wakefield Prison.
Why did Harold Shipman hang himself?
Shipman's motive for suicide was never established.
Did Harold Shipman do any interviews in prison?
Shipman refused to take part in courses which would have encouraged acknowledgement of his crimes.
Are there any other interesting aspects about the Harold Shipman article?
Some of the victims' families said they felt cheated.

Question: Why did they feel this way?
Self-contained rewrite: Why did the families of Harold Shipman's victims feel cheated by his suicide?