A U.S. Marine from Maine has pleaded not guilty to manslaughter and drunken driving charges in connection with a car crash in June that resulted in the death of his sister and another passenger. The Kennebec Journal reports, that Travis Lawler was released on $1,000 cash bail after pleading not guilty Tuesday to two counts of manslaughter and aggravated operating under the influence. Prosecutors say the 23-year-old Lawler was home on leave from Camp Lejeune in North Carolina when the car he was driving went off the road and crashed into a tree in Belgrade on June 16. His sister, 20-year-old Kristin Lawler of Oakland, died at the scene. Another passenger, 25-year-old Jackson Bolduc of Belgrade, died the next day. A third passenger survived. His lawyer had no comment.