Whistleblower by Tess Gerritsen

Cathy Weaver is on her way to visit her pregnant friend Sarah when a man appears on the rain-drenched highway and she hits him. This meeting with Victor Holland leads to a flight for their lives. Holland is a whistle blower and the big boys don't want him to tell his story. One man is already dead. Who can they trust? Intrigue and suspense with a little romance.