tong shao , a chemical engineering student at iowa state university , went missing in september 2014 .
after a three week search , police found her body stuffed in the trunk of her toyota camry in iowa city .
shao 's boyfriend , xiangnan li , 23 , was listed as a person of interest in the case and is believed to have been the last person to see her alive , however he bought a one-way ticket to china in the days after his girlfriend went missing and has disappeared that