26 former students to be sentenced. luke visser, michael bonatucci and joshua kurczewski will spend one to nine months in jail. they pleaded guilty to hazing and conspiracy to commit hazing. it was more than two years ago when piazza died after falling down a flight of stairs at an alcohol-fueled frat party. surveillance video capturing the brothers serving him more and more alcohol. and, after the fall, waiting 12 hours to call 911. piazza's parents say only one former frat brother has shown any remorse. >> everyone else just seemed to want to move on with their life and no one has reached out to us or apologized to us. >> reporter: and david, piazza's parents hope that these sentences will lead to greater change at fraternities all across this country. meanwhile, many of the other frat brothers have already pleaded guilty. david? >> gio, thank you. when we come back tonight, news on that serial rapist, 12 cases, and what we've learned now. and news on the flu tonight. could there soon be one step to protect us all?