A road rage investigation on Interstate 10 led California Highway Patrol investigators to a significant discovery in Yucaipa. They arrested a local resident, Robert Valdez, and seized a large quantity of firearms and ammunition. The seizure included 20 illegal firearms and a substantial amount of ammunition.

The investigation began in July and ultimately resulted in the arrest and seizure of the firearms and ammunition. Further details about the road rage incident and the investigation are available from the source. The case involves a notable amount of seized items, including 20,000 rounds of ammunition.

For more information on the investigation and arrest, readers can refer to the original report.