The last time Shaffer was seen on surveillance video outside the Ugly Tuna Saloona he was with two women, Brightan Zatko and Amber Ruic. Ruic said in a phone interview Friday that she was never asked to take a polygraph.
Brian's brother, Derek, is the last surviving member of the immediate family. His father, Randy, died on Sept. 14, 2008, when a tree limb fell on him outside his house during a windstorm. Derek's mother died of cancer three weeks before Brian went missing.
In a phone interview last week, Derek Shaffer said he was not asked to take a polygraph but that his father took and passed one. Derek Shaffer also said he thinks it's odd that Clint has refused to take any polygraphs.
"As soon as the detective started getting involved, that's when he pretty much had no contact with anybody," Derek Shaffer said. "I've always thought he definitely knows something - just won't come forward with it.
"If Brian did take off somewhere, if that is the case, we just always had a strong feeling that Clint would possibly know that."
Shaffer's girlfriend at the time, Alexis Waggoner, also thinks Florence knows something he doesn't want to tell. But her opinion regarding Shaffer's whereabouts now is different than Derek's.
"I don't think he's alive," Waggoner said. "I can't imagine he would have just done that."
Alexis Waggoner's father, Tom Waggoner, participated in the search for Shaffer in 2006. During that period he became acquainted with Florence.
"The gist of my perspective on Clint Florence is that I think that basically all roads to making any progress on the case on Brian Shaffer lead through Clint Florence," Tom Waggoner said.