Well, you can try Carfax.
http://www.carfax.com/cfm/general_ch...CMP=KNC-Google
It's better than nothing I suppose.
It's a bit better on older cars.....where maybe a guy is saying that he is the second owner......and carfax will show every change of ownership.....
As to accidents............if it was a reportable accident it may be on their report.........
The other thing thatwould be interesting is what the dealership has on the computer.
I don't suppose they have a legal obligation to show you the maintenance history.......but they sure have a moral obligation.
And they should tell you who the previous owner was ......you can call him........ I had a guy call me one time.......
And if the guy who you are buying it from is not a Caddie dealer......maybe you can take the VIN and ask the local Caddie dealer to take a look on the computer