North Korean Defector Investigated for Sending Hot Air Balloon Full of Leaflets Insulting Kim Jong Un On 5/6/21 at 10:53 AM EDT A North Korean defector living in South Korea was investigated by police on Thursday for sending helium balloons across the border carrying hundreds of thousands of leaflets and booklets criticizing the North's leader, Kim Jong Un. Park Sang-hak, head of a group of defectors called Fighters for a Free North Korea, had his office raided by South Korean police for violating a new law that makes it illegal to send such propaganda across the border. Park, along with other activists, has been doing such activities along the South Korean border for years.