I had the same thing with a car i sold the bloke had it a week and changed the stereo in it and it went up in flames the next day, he was telling everyone it was the was i had taken my stereo out.
I don't think so, so i told him it was his problem and it was sold as seen and if the doors had fallen off as he went down the road it would of been his problem thats without him mucking about with the electrics.
It's funny he had played with the wiring and then the next day the car caught light starting behind the dashboard.