MARTINEZ — Contra Costa County District Attorney Robert Kochly said Thursday that his office has been looking into the activities of county Assessor Gus Kramer, who was the subject of a series of stories in the Times about his private property investments and actions as an elected official. Kochly, who stressed the probe is not a criminal investigation, said he would not reveal the focus of the inquiry. Kramer's attorney said the inquiry began about six months ago. In a series of stories in June, the Times revealed that Kramer is an active property investor who in 2004 bought a...