The Department of Special Investigation (DSI) has stepped up a probe into a land-encroachment case in Ratchaburi linked to a high-profile murder allegedly ordered by the father of a Cabinet member in the Abhisit Vejjajiva government.

Speaking yesterday during an inspection, DSI special agent Prawuth Wongsrinil said two vast land plots involved in the case would be surveyed along with a crime scene investigation into the murder, in which Sucha Kleebbua was shot dead on a local bus in broad daylight by a lone gunman on September 21, 2009.

Read more: The Nation