lol there was no firefight. Once he was pinned down they just decided to burn it down.
You have cops saying "burn it down" on tape and the do just that. After its all said and done the chief says they didnt intentionally burn it down..... yeah... right.
They just didnt want to send their SWAT team in to get massacred.
Supposedly Dorner was in the basement when they found his body, he was probably preparing to make his last stand against SWAT there but the LAPD had other ideas.