Watts' co-worker Mr Roberts told investigators it was "unusual" for Watts to text him on a weekend.
"I try to give you space, but while you are working and living the bachelor life I'm carrying our 3rd (child) and fighting with our two kids daily and trying to work and make money", Shan'ann texted her husband on July 24, in what authorities said was one of the many apparent attempts she had made to save their almost six-year marriage.
Watts eventually pleaded guilty to their murders and a Weld County judge sentenced him to life in prison on November 19.
"I guess when you want to, it happens", he said to the camera, while holding a positive pregnancy test. "Wow".
Family killer Watts can be seen leaving the home before dumping them in an oil tank and shallow grave on the grounds of where he worked.
The sister of the birthday boy who threw the party told cops Watts had asked her to watch the girls a day earlier.
A woman who claimed to have had a one-night stand with Chris Watts revealed disturbing details about her encounter to an investigator.
Chris Watts originally said his wife smothered their two daughters but he eventually pleaded guilty to all their murders
"Oh my god", his father replied.
The security footage was taken from a neighbour's home and released by authorities after Watts admitted to murdering his family.
"I know it sounds bad, but it just seems unreal that I would know somebody that did that", McMahon said.
"That's just... it's rage", Watts added.
Watts strangled his wife Shanann, who was pregnant with their son, and smothered their two daughters, Bella, 4, and Celeste, 3, in Colorado.
He drove them to an oil field managed by his company, Anadarko Petroleum Corporation, and dumped his daughters in an oil tank and his wife in shallow dug-out grave. In a recorded interview with police the day Shanann and the girls were found dead, Kessinger appeared distraught: "It's just so sad and she's pregnant". She also said that Watts tried to "stick it in her butt", and pulled her hair and put his hands around her neck, describing the whole incident as a "rape fantasy". "This will all get fixed".
According to the court documents, the day Watts killed his family, he called his daughters' school to say they would no longer be attending.
Audi e-tron GT concept: un Gran Turismo eléctrico, deportivo y vegano
Un bajo coeficiente de resistencia que reduce el consumo de combustible y la baja elevación caracterizan visualmente el diseño . El sistema de propulsión eléctrica pone de manifiesto su impresionante rendimiento, alcanzando los 434 kWs (590 hp).