mueller is at the pima county sheriff s department giving us a briefing. we did learn a lot. the suspect, gerald lee loughner in custody will face formal federal charges this afternoon for the assault on congresswoman gabrielle giffords. the killing of one staff member and assault on other staff members and the killing of a federal district judge. we also learned that the second person that they are thinking about on this person of interest, the picture you saw of that 40 to 50-year-old man was seen caulk into the safeway there in tucson with loughner to the point where federal authorities believe he might be with loughner, traveling with loughner. they want to know who it buy it is and they want who this guy is and they want to talk to him. they are not calling him a suspect. loughner attended a similar event to the congressman on your corner event in 2007.