TAPPER: Breaking news in our national lead today. New details on the help that the Dayton shooter got in the months before his deadly attack. According to federal prosecutors, the gunman's friend bought the high- capacity magazine and body armor that the killer used to slaughter nine people and injure 22 others. This friend hid all of that in his house so the shooter's parents would not find them. He also told officials that he and the gunman regularly did hard drugs together but between 2014 and 2015. He's now in custody and being charged with lying on federal forms in order to obtain the firearms for himself. And some more breaking news in our national LEAD, sources are now telling CNN that accused pedophile Jeffrey Epstein was not checked on for hours before his death in a New York City jail over the weekend, despite protocol mandating a check every 30 minutes. Sources also say the investigation is now focused on not only the 24 hours before Epstein's death but into wider systemic problems at that jail. CNN's Brynn Gingras is outside the Metropolitan Correctional Center in Manhattan. And, Brynn, what else are you learning about the issues at the jail?</s>BRYNN GINGRAS, CNN NATIONAL CORRESPONDENT: Yes. Well, Jake, listen, this correctional center has a good reputation. It's actually considered one of the best-run in the whole Bureau of Prisons facility. But obviously something went wrong here. You talked about the protocols that were not followed when it came to Epstein. Well, a different source is saying that two guards who were charged with keeping a watch on Epstein were working overtime shifts, something that was complained about or has been complained about by people who work inside this facility and likely something that's going to be looked into by an admitted angry Attorney General Barr.</s>WILLIAM BARR, ATTORNEY GENERAL: I was appalled.
Federal Prosecutors: Dayton Shooter's Friend Bought High-Capacity Magazine, Boy Armor Used In Deadly Shooting