Fred Prosser is charged with first-degree murder in the death of his ex-girlfriend, Sabrina Patterson. (CBC)

The first-degree murder trial of a Moncton-area man accused of killing his ex-girlfriend began for the second time Tuesday with jury selection.

Fred Prosser, of Shenstone, is charged in the death of Sabrina Patterson, the 25-year-old mother of his two children.

Patterson, of Riverview, went missing on Oct. 29, 2010. Her body was found in a wooded area near Shenstone on Nov. 6, 2010.

Prosser has already been through one jury selection process. He was originally scheduled to stand trial in Patterson's death in July, but the proceedings were halted on the first day when one of the selected jurors was found to have made comments about the accused on Facebook.

Judge George Rideout declared a mistrial, saying he had no choice because there was a risk the juror may have tainted the rest of the jury.

The incident led to discussions of how people can use social media in a way that can come back to haunt them.

The selection of a new jury is taking place in a makeshift courtroom at the Moncton Coliseum.