The incident is under investigation, the Marines said.
An investigation has revealed new details about a military round that exploded over the 5 Freeway last October, scattering metal debris onto traffic below.
Witnesses uploaded videos of the arrest in California. Federal agents struggled with Narciso Barranco and pinned him to the ground outside an IHOP, where he had been clearing weeds.
Lance Cpl. Chukwuemeka E. Oforah, 21, fell into the water on Saturday while assigned to 3rd Battalion, 6th Marines out of Camp Lejeune, North Carolina.
"His honorable service to his country will not be forgotten." A U.S. Marine who died during a training exercise Wednesday at Camp Pendleton has been identified as 21-year-old Private First Class Tanner Rubio from Dixon.
Members of the U.S. military have the legal right to refuse orders they believe are unlawful, but they risk violating military laws of obedience if the order is in fact lawful, experts in military law say.