Smothermon said Andrew Fish, 25, is the main suspect in the killing. Reuben Fish, 33, is considered an accessory at this point.
The brothers have previous arrests, court records show.
In 2010, Andrew Fish was arrested and charged with possession of a controlled substance, harboring a runaway child, concealing stolen property and unlawful possession of drug paraphernalia. Court records show he pleaded guilty to these crimes in March 2011 and was placed on five years probation.
He also pleaded guilty to breaking and entering and drug possession charges in 2006 and completed probation, records show.
Reuben Fish was arrested in December 2010 and charged with assault with a deadly weapon, but the case was dismissed due to lack of evidence, records show.
The elder Fish brother also was arrested in 2005 and charged with breaking and entering, but the charges were dropped at the request of the victim, court records show.
A court date hasn't been set for the Fish brothers, and it's not clear whether they have an attorney.