Automobile Camera Recorders Systems

I am looking for suggestions on what to use for a customer who has a feud on go with a mental person.He has been keying his cars and as of late has put javex or fiberglass resin in his fuel tank and totally destroyed his new vehicle. He is looking for a good system to record motion around his vehicles when he is away from his house.System has to be able record under challenging light conditions and record for 3-4 days or so.

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