Arson has not been ruled out as part of the cause of the fire.
6 seconds sound clip from the Donnie Darko movie soundboard.
You can hear this line at 01:30:07 in the Blu-ray version of the movie.
Quote context
[...]
- You know what you say to people like that? Hmm? Fuck you.
- The blaze was extinguished sometime after 8:00 last night.
- Firefighters discovered what has been referred to as a kiddie porn dungeon.
- Arson has not been ruled out as part of the cause of the fire.
- Oh, my God. Dad played golf with that guy.
- Vehemently denied the alleged link to a child pornography publishing circuit.
[...]