The fourth suicide of a Nassau County inmate in the last 12 months has triggered the alarm of a key state lawmaker and inmate advocates..."We've been in communication with Department of Justice attorneys," said Samantha Fredrickson, executive director of the Nassau chapter of the New York Civil Liberties Union. She said she was rebuffed after she sought a meeting last fall with jail and county officials to address medical and mental health problems. "This death really illustrates that there are serious issues that demand immediate action."