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Fred Prosser is charged with first-degree murder in the 2010 death of Sabrina Patterson. (CBC)

Crown prosecutors closed their case in Fred Prosser's first-degree murder trial on Wednesday after calling two DNA experts as their final witnesses.

The jury has been dismissed until Thursday morning when the defence will announce its plans. It's not yet known whether Prosser will testify in his own defence.

Prosser, 33, of Shenstone, is charged with first-degree murder, sexual assault causing bodily harm and sexual assault in the 2010 death of Sabrina Patterson, his ex-girlfriend.

Patterson, a 25-year-old mother of two from Riverview, went missing on Oct. 29, 2010. Her body was discovered eight days later in a wooded area near Shenstone.

On Wednesday, a DNA interpreter who works at the RCMP lab in Halifax, told the Moncton courtroom Patterson's DNA was found on a piece of the boxliner of Prosser's truck.

The DNA came from the victim's genital area, said Joy Kearsey.

Kearsey said she is very confident in the results. The chance of being wrong is one in 120 trillion, she said.

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Sabrina Patterson's DNA was found on the boxliner of Fred Prosser's truck, a DNA expert testified. ((Sabrina Patterson memorial site))

Prosser's DNA was also found on a swab taken from Patterson's neck, said Kearsey.

Under cross-examination, however, she admitted DNA tests can't say how or when the DNA was deposited on an exhibit.

The court also learned it was Prosser's DNA sample that had gone missing for several months.

Earlier this week, the officer who was in charge of keeping track of the 600 exhibits being stored for the trial, said RCMP realized some of the items went missing in February and only reappeared 10 days before the trial began on Nov. 21.

They were located in a secure fridge that had been repeatedly searched by police, said Const. Matt Roy. But the exhibits were in a bag and officers had been looking for a box, he said.

Kearsey said she was given a new sample of Prosser's DNA in July, retested all of her samples and came up with the same results.

A DNA analyst with a private lab, Curtis Hildebrandt, was hired to reconfirm samples taken from the victim's neck and genital area.

The DNA came from Prosser, or Prosser's kin, he said.

Five weeks have been set aside for the trial.