Unturned Stones

What secrets did the UFO investigator take with him when he died on the Silver Bridge collapse in December of 1967? Thirty years later, is it already too late for the world to discover?
Jack Barrett is living the good life. Finally making enough from his detective novels to retire from his job as a homicide detective at the Columbus Police Department, he now lives in a lakefront cabin at Indian Lake. His neighbor is a beautiful former FBI agent now running the Wolf Island Inn, and their relationship is progressing nicely. Then he is invited to meet the beautiful Cassie, a singer/songwriter he's been a fan of for years when she comes to Ohio for a concert. So life just keeps getting better! That is, until a widow in his writers group gives him an old, unfinished manuscript her husband left her when he was killed in the Silver Bridge Collapse 30 years earlier. And a box of interview tapes. The content of which will threaten Jack and all he cares about with their very lives.
It seems the newly elected young President and his wife have a secret, and Jack is warned to leave it alone. But they don't know Jack, as it turns out, is a stone cold killer himself...