Nicholas Long, Commissioner of the Independent Police Complaints Commission, said Sean Price almost got away with deceiving their investigation.
He told reporters that Mr Price had lied and put pressure on a member of staff to lie on his behalf.
Mr Long said the former Chief Constable used his position to order people to do as he wished and said his standards fell far below those expected of someone in his position.
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It is now nine years since Claudia Lawrence was last seen alive - it's feared the 35-year-old chef from York has been murdered
Brave four-year-old Emily called 999, before contacting her dad Stephen and making sure her younger brother and sister were cared for.
The 42-year-old is said to have been involved in a collision with two other cars while he was driving in West London on Sunday (18th March)