A man in America, Matthew Brendan Warner has been charged with sexually abusing and killing his 19-day-old daughter, Ellorah Rose Warner.

In a court hearing on Tuesday, January 27, the 30-year-old was charged with one count each of murder, assault on a child causing death, torture, oral copulation or sexual penetration with a child and aggravated sexual assault of a child.

According to prosecutors, the body of the baby was found in a cab of a pickup truck.

Last Friday, January 23, Warner and his wife reported that their 3-weeks-old daughter, Ellorah Rose Warner, had disappeared from their home in Newhall.

About 12 hours later, police deputies announced they had arrested Warner after he led them to her body inside a parked pickup truck.

According to the wife, Allison, Warner was on probation for drug charges; he was jobless and she said she knew that Warner was going to be a danger to the baby.

"He gave the appearance of adoring that child, it was not genuine," Allison said.

As the result an autopsy remain hidden, mother of Warner, Victoria Law-Thought thought her son was clean and sober after his drugs problem and revealed that she doesn't believe yet that he is guilty.

"That's why I don't understand this. He loved his little girl, adored her, and I don't believe what I'm hearing. It's just rumours. I just don't want this viciousness to continue. Just people back off let the courts do what they're supposed to do and not the public opinion," his mother Victoria Law-Thomson said.

After the sexual assault charges were included, Judge David Walgren increased bail to more than $2 million and set his arraignment for Wednesday, February 18.

Warner faces a maximum penalty of life in state prison if convicted of all charges.