. >> the lawyers called to the stand their main witness, nici's doctor, carol waymac, nici's primary nici's history, that she had trouble has a young woman. >> i did. >> and had actually been in rehab at one point. >> and we had talked about it throughout her care with me. >> so when nici came into the office complaining of severe back pain at the end of 2005, doctor waymac said she had nici's past addiction in mind. the doctor testified that she did put nici on pain medication. but said she tightly monitored nici's weekly prescription, right down to counting the number of pills. >> on january 12th, she got 56. on january 18th, she got 56. and on january 26th, she got 56. >> nici was getting hundreds of pills, but the defense reminded the jurors that nici's toxicology report had shown something unusual. despite being prescribed all those pills, the forensic scientists said she apparently hadn't been taking many of them. >> is it your opinion that this just reflects like a one-time use? >> i believe so. it's such a small amount. >> almost no drugs in her system meant something was ver