Convicted Canadian pedophile Christopher Paul Neil appeared in a Thailand court Tuesday to face charges that he sexually abused a nine-year-old boy.

Neil, from Maple Ridge, B.C., is already serving a three year and three month jail sentence in Thailand after he pleaded guilty last May to sexually abusing a 13-year-old boy.

The new trial, in which Neil has pleaded not guilty, involves the younger brother of the 13-year-old victim.  The charges include sexually abusing a minor, videotaping the alleged abuse, taking a child without parental consent, and holding him against his will.  

The child, who was nine at the time, claims Neil paid him to perform oral sex in 2003.

If convicted, Neil faces up to 20 years in prison.

However, journalist Dean Adams said a guilty verdict will likely carry a similar sentence to Neil's last conviction.

"It's really up to the judge in the case," Adams told CTV's Canada AM on Tuesday from Bangkok.

He said the case is expected to continue for the rest of the week.

"We should have some results on Friday as to what convictions might arise out of all of the proceedings this week," Adams said.

Neil was arrested in Thailand on Oct. 19, 2007, after the international police agency Interpol unscrambled swirled digital images from about 200 Internet photos, which allegedly show Neil engaging in sexual acts with young boys.

Hundreds of tips were received and Neil was arrested 11 days after the Interpol appeal was launched.

Neil admitted through his translator that he took the photos but said he did not post the pictures online.

During Neil's last trial, the victim, now 18, testified he went to Neil's apartment in Bangkok where the crime was committed.

Photos that allegedly showed Neil engaging in sexual acts and playing with naked or partially clothed young boys were also presented at the trial.