The former neighbor of one of the San Bernardino shooters is accused of providing two guns that were used in the Dec. 2 attack that left 14 people dead.
The grand jury indictment accuses Enrique Marquez of conspiring to support a terrorist attack, as well as making false statements to federal authorities.
Enrique Marquez purchased the assault-style rifles used on Dec. 2. He and Syed Farook had planned a different attack in 2011 and 2012, which they never carried out, officials say.