Statue of Limitation for Highway Traffic Act charges is 6 months. So he can appear at your door with a summons within that time.How days have to pass by before the knock on the door?
If they're laying criminal code charges for "flight from police" it's still 6 months for summary convictions; there are no statue of limitations for indictable offences.
If someone does knocks on your door, don't say anything. If they're laying criminal charges, and arresting you... ask for a lawyer.
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R. v. Lotufo, [2008] O.J. No. 2894
I've read a decision where undercover officers boxed a driver in, and pulled a gun on him while he had his fiancée in the car. He clipped the unmarked cars and sped away. He only stopped when he saw marked police officers.
He had the defence of necessity and was found not-guilty. Good read if you have time.