Conversation so far:
How does season 2 of one tree hill end
Season two of One Tree Hill ends with Lucas telling Brooke how he feels about her and someone setting the dealership on fire while Dan is still inside.
Who set Dan's dealership on fire on One Tree Hill
It is revealed in season 3 of One Tree Hill, that Deb is actually the one who drugged Dan's drink and set the auto dealership on fire
Why did Deb set Dan's dealership on fire on One Tree Hill
In season 2 of One Tree Hill, Deb set Dan's dealership on fire because she was tired of his constant abuse and manipulation.
Who was Dan's first suspect for the dealership fire on One Tree Hill
In season 3 of One Tree Hill, Dan was convinced that Lucas was the one that had tried to kill him by setting fire to the dealership.

Question: What did Dan do to this first suspect
Self-contained rewrite: What did Dan do to his first suspect of the dealership fire, Lucas, on One Tree Hill