Chris Watts First News Today : Breaking News, Live Updates & Top Stories | Vimarsana

His wife and smothered 3-year-old celeste and 4-year-old bella, who they say fought back. >> imagine the horror in bella's mind as her father took her last breaths away. >> reporter: the girls then violently stuffed into oil storage tanks. shanann buried in a shallow grave. the motive? prosecutors say it was simple -- watts wanted a fresh start with a new woman. >> if he was this happy and wanted a new start, get a divorce. you don't annihilate your family and throw them away like garbage. >> reporter: prosecutors say while shanann was trying to save their marriage, watts was texting his girlf...

Shanann, who once gushed about her husband, brutally killed, along with their two granddaughters and unborn grandson. ♪ my daddy is a hero >> reporter: watts' mother-in-law blasting him for the ultimate betrayal. >> your children adored you and they also trusted you. your daughter bella marie sang a song proudly, it was, "daddy you're my hero." >> reporter: as police searched for watts' missing family in early august, he went on tv, begging for their return. >> shanann, bella, celeste, if you're out there, just come back. >> reporter: today, watts' parents saying their son needs to atone for...

Pregnant wife and two young daughters was sentenced today. and what we've just now learned. chris watts had already pleaded guilty to killing his wife and daughters, celeste and bella. you'll remember when they disappeared, he made that emotional appeal for them to return home. authorities say he had already killed them. in court today, prosecutors now revealing grim new details of the crime, and both families spoke. the family of the pregnant wife and his own parents spoke, too. what they said about their own son. abc's kayna whitworth was in the courtroom in greeley, colorado. >> reporter: f...