out to the lines, ashlee, california, hi, ashlee. uh-oh. excuse me, heather, west virginia.w are you? >> i'm good, dear, what's your question? >> caller: it's good to talk to you. i admire you so much. >> likewise. thank you for calling. >> caller: i was just wondering, do you know if the mother has willingly taken a polygraph yet to rule herself out as a suspect? >> excellent question. what do we know about polygraphs? >> police have not told us she has taken a polygraph. all they have said so far, nancy, is that she's been questioned, she was questioned all day yesterday and again today. >> let's go to the expert. marc klaas joining us from san francisco founder of klaas kids foundation. see that button he's wearing on his left lapel? that's a picture of his daughter, pollee klaas. she was missing from her own home, kidnapped, assaulted and murdered. since then, klaas has been nothing but a victim's rights advocate. as i recall, marc klaas, when polly went missing with the the first thing you did was, please, take my dna, my hair, my fingerprints, i demand a polygraph. wha