Conversation so far:
How old was Harold Shipman when arrested?
Harold Shipman was 52 years old when arrested for murder.
How long was the Harold Shipman murder trial?
Harold Shipman's murder trial lasted from October 1999 to January 2000.
Did Harold Shipman have a statement during his murder trail?
Harold Shipman never made any public statements about his actions.

Question: What was his reason for denying guilt?
Self-contained rewrite: What was Harold Shipman's reason for denying guilt during his murder trial?