tonight. that is it unfortunately or fortunately. i'll see you back here tomorrow night. "ac360" starts in just a moment. good evening i'm john berman in for anderson tonight. we begin with breaking news, the first arrest in the san bernardino terror attack and new details about the attacks, plural that one of the killers planned months before the shooting. enrique marquez bought the guns used. tonight he is in custody and facing three charges. the shooters were killed as they fled from police. what we are learning from court documents deeply disturbing. pamela brown joins me now with more. these attacks that enrique marquez is being charged with planning with syed farook a few years ago, what have you