Closing arguments under way in Jeffrey MacDonald hearing Closing arguments are under way in a federal judge's hearing on Jeffrey MacDonald's 1979 murder conviction. The former Army doctor's lawyers argued today for a motion to vacate the 33-year-old conviction. The defense based much of its argument on statements from witnesses who said they heard Helena Stoeckley, a now-deceased drug user, claim that she was at the scene of the 1970 murders and that three of her friends attacked MacDonald, his pregnant wife and two daughters. Yesterday, Jerry Leonard, the lawyer who represented Stoeckley during MacDonald's 1979 trial, said his client told him her friends -- high on drugs -- initially wanted to confront the Green Beret physician over his tough stand against drug users. It got out of hand. People started getting hurt," Leonard recalled his client saying. She didn't hurt anybody. She didn't know anybody was going to get hurt. All of Stoeckley's alleged confessions about being at the crime scene have come through secondhand sources. When she was called to testify in MacDonald's 1979 trial, she said she had no recollection of the hours during the crime. In closing arguments, the defense also brought up three "unsourced hairs" found at the crime scene, including one hair found under the fingernail of MacDonald's 2-year-old daughter Kristen. According to the defense, DNA analysis -- a forensic tool unavailable during 1970s -- shows the hairs are not linked to anyone in the MacDonald family. "No reasonable juror would have found Jeffrey MacDonald guilty if that jury would have heard that new evidence," said defense lawyer Gordon Widenhouse. The prosecution is making its closing arguments today.