The estranged husband of Jennifer Dulos, the Connecticut mother who vanished in May, speaks out to NBC News in his first national interview. Fotis Dulos, who along with his girlfriend pleaded not guilty in charges related to the case, says he believes she’s alive. NBC’s Stephanie Gosk reports for TODAY. See more of his exclusive interview with Dateline NBC on Monday at 10 p.m. EST/9 p.m. CST.