A white father-of-four has confessed to setting his own car on fire and painting a racial slur on their garage door in a staged hate crime.

David and Jenny Williams from Denton, Texas, woke up to find their truck and motorcycle ablaze and the vile slur 'n***** lovers' scrawled across their garage door in spray paint on December 12.

Police deemed the incident a hate crime and launched an arson investigation while well-wishers donated money to the family to help repair the damage.

On Tuesday, Mrs Williams however revealed it was her husband who had started the fire.

David Williams, a white father-of-four, has confessed to spraying this racial slur on his own garage door as part of a staged hate crime

'David confessed to spray painting our garage door and starting the fire at our home,' she wrote in a Facebook post to friends.

Mr Williams, 34, had been checked in to a 'mental facility', she said, and would be arrested upon his release.

'My heart is heavy, and I have more questions then answers. My children and I are in a state of shock and sadness,' the 35-year-old said.

The 34-year-old also set the family's truck and motorcycle on fire, his wife Jenny (left together) said

A GoFund Me page set up by the family's friends after the incident had stopped taking donations, she added, and all donations given before her revelation will be returned.

In a blog post last week, the mother-of-four described the apparent vandalism in great detail.

She told how she woke up with her sleeping husband next to her to the sounds of a neighbor banging on their door to tell them their truck was on fire.

'We woke the children before we knew the house itself wasn't on fire. In the middle of the night it is hard to tell the difference between smoke and steam.

'The kids and I gathered in the living room waiting for word of all clear or evacuate,' Mrs Williams said.

The couple alerted police on December 12 after waking up in the middle of the night to find their truck ablaze

Their Harley Davidson was also set on fire in the apparent 'hate crime'

Mrs Williams said her husband had checked into a 'mental facility' and would later be arrested

She vowed to return all the money raised through a GoFundMe page set up by friends

Once police and fire fighters arrived at the house, they discovered the racial slur scrawled on the garage door.

The couple said their insurance would not cover the entire cost of the damage

'It is considered a hate crime because of what was painted on the garage door. Yes, we are white.

'It just so happens that we aren't as racist as someone would like us to be,' Mrs Williams wrote.

Denton Police were not available to verify Mrs Williams' claim her husband had confessed on Saturday.

No motive has been suggested. The couple repeatedly told how their insurance would not cover the damage in total after the fire.

A GoFundMe page set up by Mr Williams's sister and a friend of the family has raise more than $5,000.

'The kids won't be able to have anything under the Christmas tree due to this horrible act.