A court hears how Ashley Hudson, 40, told his victim he "would rather kill her than leave her".
The driver of the farm vehicle is arrested on suspicion of causing death by dangerous driving.
A road is closed in both directions for several hours while a clean-up takes place.
Tom had toddled about five miles away during his three-week adventure in the wild.
Officers in Peterborough spot two people of interest during their latest use of the technology.
Paul Street, 41, is cleared of assault but found guilty of misconduct.
The man has since been charged with multiple offences, police say.
Police eventually capture the driver as he hides in a bush.
Police say a man arrested on suspicion of attempted murder has been bailed.
