Might be a good time to backup your drive before logs are rotated... At the time of your writting, you only have kernel.log as a boot time clue, and it will self erase.
Good point. I already saved a copy of system logs.
IANAL but I'd suggest you go further and stop using your computer as soon as possible. Use linux to DD the drive onto a secondary backup drive as a bit for bit archive, put the existing drive in the possession of a third party and then start from scratch. Each time you use the computer you're damaging your credibility in a potential lawsuit.