The court began the inquiry as requested by a public prosecutor under the provision of Article 150 of the Criminal Cases Procedural Code.
Hiroyuki Muramoto was killed while shooting a video of the clash at the Kokwua Intersection on 10 April 2010.
The Army insisted he was shot by an armed fighter among the protesters but the red-shirt leaders claimed he was shot by a troop.
The inquiry began with a testimony from the cameraman’s brother, Yusuke Muramoto, 43, who affirmed the identity of his brother and told the court that his brother came to Thailand to cover the event for Reuters.
Thida Thavornset, the chairwoman of the red-shirt movement, also attended the hearing.
The next nearing is scheduled on July 2.