Ronald L. GILBERT of Riley and Gary F. LANSAW of Terre Haute disappeared Sep. 18, 1984 and have not been seen since. The suspicion is that they were victims of violent foul play related to a drug deal, but no bodies have been found and state police are still working the case. The day they disappeared, "they were traveling back and forth between Terre Haute and Paris, Illinois area. " He said they returned to Terre Haute around 7 o'clock that evening.