Alirio de Jesus Pedraza Becerra was last seen on 4 July 1990 in Bogota. Eye-witnesses report that he was seized by about eight armed men; some reports claim that Dr. Pedraza’s abductors identified themselves to two police agents who were present. Official inquiries have been initiated into his « disappearance » but his whereabouts remain unknown. Dr Pedraza was a member of the Comite de Solidaridad con los Presos Politicos (CSPP) and has worked on behalf of peasants and trade unionists. Since his « disappearance », a number of human rights workers have received anonymous death threats, namely Sandra Munoz, Elvia Uran and Martha Luz Saldarriaga Velez. A colleague of his, Dr Daniel Libreros Caicedo was detained in March 1990 but released a few days later.
