background. if it was here in the united states, the pilots, all information about them would be looked at very closely. and that would include the searches of their residences, to search for their computers, what kind of e-mail traffic they have, cell phone traffic. but malaysian police say they haven t searched their homes despite early reports they did. reports suggesting that malaysian police searched the homes of the crew are not true. reporter: investigators are also looking at the pilots past behavior. a passenger on a flight co-piloted by hamid told piers morgan hamid let her and her friend take pictures and even smoke in the cockpit. if the pilots didn t do anything to sabotage the plane, what about the rest of the crew and the passengers? despite chinese reports raising concern about a passenger of uighur descent on the flight, one official tells cnn it wasn t a pervasive concern for investigators. do any of the names match up to any of the databases, the