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WILMINGTON -- A hearing for a former Green Beret and Fort Bragg surgeon continued Tuesday in Wilmington.

Jeffrey MacDonald is serving life in prison for murdering his pregnant wife and two daughters more than 40 years ago.

MacDonald has maintained his innocence and in the hearing, he's requesting forensic evidence and testimony.

Tuesday's testimony has focused on Helena Stoeckly. She was one of the defenses' witnesses in the trial in 1979, but she has since died.

Her brother, Eugene Stoeckly, testified to speaking with his mother about Helena's involvement with the MacDonald case.

She told him Helena was in the MacDonald's house the night of the murders. After some thought, he shared this information with Kathryn MacDonald, MacDonald's current wife.

In an affidavit signed by the mother, she said Helena confided in her and told her where she was the night of the murders, but Helena lied on the stand because she was afraid of the prosecution.

During cross examination, federal lawyers have focused on Eugene, saying that during the trial in 1979, the FBI contacted his parents and told them to keep Helena's mouth shut.

During this questioning, Eugene admitted that he did not know exactly when the FBI contacted his family.

Throughout the hearing, MacDonald has been very attentive. His wife and friends are in the courtroom and every once and a while have trouble holding back tears.