The father of a six-year-old girl who was preyed on by a sex fiend convicted by the Singapore court to four years' jail, has spoken out against the sentence on Facebook.

The post made the rounds online before it was subsequently removed:

The father's identity has been redacted.

The case

Joshua Robinson, 39, an American mixed martial arts instructor, was jailed four years for sexually assaulting two 15-year-old girls and filming the assaults.

On March 2, 2017, he pleaded guilty to nine charges in total.

The police seized 5,902 obscene films, including 321 films of child pornography when they raided his home.

This is believed to be the largest haul of child pornography seized from an individual in Singapore.

The charges he pleaded guilty to include: Three for sexually assaulting the girls, five for making and possessing obscene films and one for showing an obscene film to a six-year-old girl.

Another 20 charges, including four more for sexual assault, were taken into consideration during sentencing.

Robinson was caught in June 2015, two days after his second victim went to the police.

"There is no doubt in my mind that in doing what he did, the accused was a sexual predator," district judge Crystal Ong said during sentencing.

"The law must come down hard on such individuals so as to specifically deter them from re-offending and also to deter others from committing such acts against vulnerable young persons."

Charge of showing obscene film to six-year-old girl

One of the charges of showing an obscene film to a six-year-old girl was an incident that occurred in July 2015.

This was only a month after Robinson was out on bail, following his arrest for the sexual assault on the 15-year-old girls.

The six-year-old girl's father had brought her along to the Brazilian Jiu-Jitsu Singapore’s gym at Peace Centre.

While her father was training, Robinson approached the girl and showed her an explicit video of his girlfriend performing a sexual act on him, before instructing her not to tell anyone.

The girl told her mother later that day.

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