A state-of-the-art assessment is presented of the number, training, and experience of scientific and paraprofessional personnel serving the criminal justice system as expert witnesses. The study concentrated on the following disciplines: criminalists, coroner/medical examiner personnel (especially forensic pathologists), forensic anthropologists, forensic odontologists, forensic psychiatrists, forensic toxicologists, questioned document examiners, and evidence technicians. The target population included individuals who had testified in criminal proceedings as an expert witness in any of the above fields, between 1969 and 1974. A total of 7,007 questionnaires were distributed; 1,958 were returned for a 28% response rate. This volume presents the survey results for each discipline: the speciality is defined; background characteristics of the respondents and terms of their employment are outlined. Problems noted by the specialists and their suggestions for improvement are also discussed. General findings and recommendations for the entire project--which also included a compilation of educational institutions and a survey of practicing judges and lawyers--are included. (MV)