NORRISTOWN, Pa. (AP) -- Authorities in suburban Philadelphia have announced a $10,000 reward for information in the murder of an 18-year-old woman two decades ago. Montgomery County District Attorney Risa Vetri Ferman said she hopes the reward "and some conscience" will spur someone to help solve the December 1993 murder of Julie Barnyock. Barnyock was last seen at the Lansdale Train Station at about 11:40 p.m. on Nov. 8, 1993, when she called her father for a ride home. Witnesses saw her speaking with a man, but when her father arrived she was gone. Her body was found in a freight yard almost a month later. An autopsy concluded that she died of severe head trauma. Ferman said she also hopes that new technology not available 20 years ago will provide new information.