Human Rights Watch has called on Thailand’s army chief to stop interfering with investigations into the deadly political unrest that paralyzed the capital two years ago. In a statement on Thursday, it said that army chief Prayuth Chan-ocha was trying to intimidate investigators and critics in an attempt to halt criticism. Anti-government Red Shirt protesters staged a massive nine-week rally in Bangkok in 2010 that ended with a crackdown by soldiers. At least 90 people were killed and more than 2,000 injured. Prayuth has denied any army abuses and told investigators not to publicly report the probe’s findings.—AP