Christian Castro, 52, also faces state charges in the shooting.
Accused South Los Angeles gang kingpin Eugene Henley Jr. was newly charged with soliciting two fellow jail inmates to murder or seriously injure a witness against him in a racketeering case.
Sen. John Cornyn said there were "new complications this morning."
A Hollywood movie producer was arrested this week after federal prosecutors in Illinois charged him with defrauding investors of more than $100 million in an alleged Ponzi scheme.
The FBI served warrants at multiple locations in San Bernardino County, including a county supervisor's home and a residence in Ontario.
The investigation is in part about his finances, sources told ABC News.