Deputies were called to the Flamingo Mobile Home Park on Central near Marks around 9 am Wednesday.
They were told a man with active arrest warrants was inside one of the units.
The suspect was wanted for domestic violence-related charges.
The Crisis Negotiation Team tried to talk him into surrendering, and later the SWAT team deployed tear gas into the trailer.
After receiving no response, deputies sent a robotic camera inside and saw a person lying on the ground.
They made their way in and say the man was dead from self-inflicted wounds.
The suspect is a resident of Butte County, and his name has not yet been released.