Police questioned Korean Air heiress Cho Hyun-min for 15 hours on Tuesday,... amid allegations she assaulted an ad agency's employee during a business meeting last month. <br /> In her first public appearance as a suspect,... Cho apologized for "causing troubles",... before heading into the Seoul Gangseo Police Station. <br />She's purported to have yelled at the ad firm manager and thrown a glass at the victim, or a paper cup of juice toward other participants. <br />She denies the allegations, insisting she only pushed the firm manager. <br />
