Mum's fiancé beat 4 years old girl with Down Syndrome to death

            KEY HIGHLIGHTs 

• 4 years old girl with Down syndrome beaten to death by mum's Fiance interrupting him. 

• He inflicted severe head injuries on her and put her to bed where she lay critically injured. 

• Paramedics were sent to the couples home in Rancho Cucamonga and Kylee was rushed to hospital in a critical condition.

• She died couples of days later. 

A four-year-old girl with Downs syndrome was beaten to death by her mums fiancé for interrupting him, police said.

Adam Hughes was babysitting the girl, Kylee Willis, and her siblings when he allegedly assaulted the youngster - inflicting severe head injuries - and put her to bed where she lay critically injured.

Police claim 5ft 11ins, 16-stone Hughes became angry and beat Kylee after she interrupted him by talking on March 26.

Hours after putting the severely injured girl to bed, Hughes, 24, noticed Kylee was unresponsive with blue fingers and lips, a police report says.

He called Kylees mum, Corinne Blake, for help and she called 911 just before 8pm, according to Californias San Bernardino County Sheriff’s Department.

Paramedics were sent to the couples home in Rancho Cucamonga and Kylee was rushed to hospital in a critical condition.

She was then airlifted to a different hospital for specialist care for severe head injuries.

Kylee was on life support for several days as medics tried to save her.

She died of her injuries last Friday.