trailer shows killer Chris Watt's smiling wife in home video before he ...

A new documentary trailer has shown killer Chris Watt's smiling wife talking about their happy family life in home video footage before he murdered her and their two daughters, 4 and 3, and stuffed the little girls' bodies in an oil tank. 

'I went through one of the darkest times in my life and then I met Chris and he's the best thing that has ever happened to me,' Shanann Watts tells the camera in the chilling never-before-seen footage. 

Chris Watts strangled his pregnant wife, 34, killing her and their unborn son Nico in their bed at their home in Frederick, Colorado, in August 2018 when she confronted him about his affair with a co-worker.  

He then drove their daughters, Bella, 4, and Celeste, 3 - with their mom's corpse in the car - to a remote oil field where he worked and smothered them with a New York Yankees blanket before squeezing their bodies into an oil tank.

A new documentary 'American Murder: The Family Next Door' airing from September 30 will look into the grisly murders including the apparent picture perfect family life that led up to the crimes and the killer's efforts to convince cops his wife had ran away with their kids.

A new Netflix documentary trailer has shown killer Chris Watt's smiling wife talking about their happy family life in home video footage before he murdered her and their two daughters, 4 and 3, and stuffed the little girls' bodies in an oil tank. Pictured Chris Watts with his wife Shanann and daughters Celeste and Bella before he murdered them

A new documentary trailer has shown killer Chris Watt's smiling wife talking about their happy family life in home video footage before he murdered her and their two daughters, 4 and 3, and stuffed the little girls' bodies in an oil tank. Pictured Chris Watts with his wife Shanann and daughters Celeste and Bella before he murdered them

The online streaming giant dropped a trailer for the true-crime show, directed by Jenny Popplewell and Oscar-winning executive producer James Marsh.

The show will bring together 'raw, firsthand footage' and examined 'the disappearance of Shanann Watts and her children, and the terrible events that followed', says.   

The trailer begins with home doorbell footage showing Shanann arriving back at the family home the night before she was strangled to death by her cheating husband. 

A 911 call made by Shanann's friend Nicole plays over the footage with the woman saying she was 'concerned about a friend of mine'.

'I dropped her off at her house at two in the morning last night and I haven't heard been able to get a hold of her this morning,' she tells the 911 dispatcher. 

'I've gone to her house and her car's there. She won't answer phone calls, she won't answer text messages.' 

The trailer goes on to reveal the lengths the killer went to to distance himself from his family's disappearance before finally confessing to the grisly crimes.  

It reveals Chris sent his dead wife a text message reading: 'Can you call me please?' some point after he strangled her and dumped her body at his place of work. 

Footage shows how Chris attempted to deceive law enforcement that his wife had disappeared and taken their children with her.

'I went through one of the darkest times in my life and then I met Chris and he's the best thing that has ever happened to me,' Shanann Watts tells the camera in the chilling footage in the Netflix trailer speaking of her happy family life before her husband murdered her

'I went through one of the darkest times in my life and then I met Chris and he's the best thing that has ever happened to me,' Shanann Watts tells the camera in the chilling footage in the trailer speaking of her happy family life before her husband murdered her 

Chris Watts strangled his pregnant wife, 34, killing her and their unborn son Nico in their bed at their home in Frederick, Colorado, in August 2018

Chris Watts strangled his pregnant wife, 34, killing her and their unborn son Nico in their bed at their home in Frederick, Colorado, in August 2018

The new documentary will look into the grisly murders including the apparent picture perfect family life that led up to the crimes and the killer's efforts to convince cops his wife had ran away with their kids

The new documentary will look

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