. >> the extract, polyfeno. when they treat mice or human beings with it, it reduces the prostate cancer. fewer tumors and smaller ones. >> the group of researchers want to know why. closely looking at how the green tea interacts with the to advances in therapeutic methods. dr. darasco drinks it and studies it. the students are becoming green tea fans. >> i did open my eyes that it would be a health benefit. >> there is going to be the results to be reported at the university in april. >>> buying and selling online dangerous especially dealing through transactions truce sites like craigslist. to help keep you safe there are now safe exchange zones. carrie sanders shows us. >>> buying and selling on the internet so easy until it comes time for that exchange with a stranger. >> a stabbing occurred at 1620 year longmont colorado. >> a female stated that she has been cut by another female. >> 26-year-old michelle willkins 7 months pregnant met this women offering free baby clothes without warning that stranger from