Marion County Prosecutor Terry Curry explains that the investigation into the explosion of homes in the Richmond Hills subdivision that occurred on Nov. 10, 2012, has turned into a criminal investigation, at a news conference Monday Nov. 19, 2012. Search warrants have been executed and officials are now looking for a white van that was seen in the subdivision the day of the blast, Curry said. Federal authorities are offering a $10,000 reward for information in the case. (AP Photo/The Indianapolis Star, Joe Vitti)
