In video: Chilling moment 4-year-old girl killed by her dad praises him

A disturbing footage has emerged which shows a toddler who was murdered by her father calling him a ‘hero’.

The family video was shot two months before she was killed alongside her three-year-old sister and their mother before being dumped in an oil tank.

According to police, Christopher Watts, 33, murdered Bella, 4, Celeste, 3, and Shanann, 33, before leaving their bodies at an oil field near their house. The girls were put in a full tank to disguise the smell, according to officials.

In the heartbreaking video, Bella is seen sitting in the back of their car singing a song in praise of her father, “My daddy is a hero, he helps me grow up strong,' she trills. 'He reads my books, he ties me shoes, you're a hero, through and through. My daddy, daddy, I love you.”

The footage emerged as friends told of the financial troubles the couple had faced during their relationship. Some also suggested Watts could have been cheating, although others said their relationship had appeared strong.

Two other videos show Shanann praising her husband as 'the best thing that's ever happened to me' and telling him she was pregnant two months before he allegedly killed her and their two young girls.

Shannon was 15-weeks pregnant with a boy when she died. The child was going to be called Nico.