north korean

Investigators are beginning to shed light on the mysterious, sudden death of North Korean leader Kim Jong Un's estranged half-brother in Malaysia on Tuesday.

"It probably is the strangest story that I have encountered about North Korean elites and the Kim family," says Michael Madden, who runs the site North Korea Leadership Watch.

The U.S. State Department, the United Nations and human rights groups say South Korea's controversial National Security Law chokes freedom of expression.