The defence lawyer in the Fred Prosser murder trial dropped a bombshell in his closing arguments today.

Scott Fowler told the court his client was in custody when the body of 25-year-old Sabrina Patterson was dumped on land belonging to the Prosser family in Shenstone, N.B.

Prosser, 33, is charged with first-degree murder in the death of his ex-girlfriend. He is also charged with three counts of sexual assault.

He has pleaded not guilty to all charges.

Today, the defence hammered the prosecution’s DNA evidence against Prosser during its closing arguments in Moncton provincial court.

During the trial, the Crown said Patterson’s blood was found on Prosser’s jeans and that her clothes were found in a cooler outside a shed on the Prosser’s property, five months after her body was found.

Today, however, Fowler told the court police had searched and photographed the area several times. He also questioned why none of the evidence was submitted to the court.

“I feel that the Crown submitted everything they thought was pertinent, and submitting too much would just overwhelm them with evidence,” said Denise Murphy, sister of the victim.

Patterson, a mother of two, was reported missing at the end of October. in 2010.

Her body was found in a wooded area of Shenstone on Nov. 6, seven days after the prosecution said she was strangled to death and dumped in the woods on Prosser’s land.

But today Fowler told the court that didn’t make sense because the area had been searched several times and there was no evidence her body had been scavenged by animals.

Fowler then suggested Patterson’s body was brought there while Prosser was in police custody.

Prosser was arrested two days before Patterson’s body was found.

“Scott’s a good lawyer. Scott did his job,” said Dale Patterson, Sabrina Patterson's brother. “He may have raised questions, but the jury has those answers in front of them.”

In its closing arguments, the Crown detailed the events leading to Patterson’s death.

They allege Prosser told several people how he would kill Patterson and what he would do with her body.

“I think they detailed everything out pretty well and gave a pretty accurate timeline of everything that happened,” said Murphy.

Judge George Rideout will instruct the jury Monday. They will be sequestered until they reach a verdict on the first-degree murder charge and the sex-related charges.

With files from CTV Atlantic's Jonathan MacInnis