About Dr. Ron & Dr. Joni

Thread of Evidence deals with real crime stories; their victims, violators; and cops and forensic investigators who solve those crimes and bring the bad guys to justice. Go out onto the mean streets; visit the crimes scenes and work in the forensic lab with Forensic Criminologist, Dr. Ron Martinelli and Forensic Psychologist, Dr. Joni Johnston. Ron Martinelli, Ph.D., CMI-V, is a nationally renowned forensic criminologist and retired police detective with the San Jose (CA) Police Department. Dr. Joni E. Johnston is a licensed clinical/forensic psychology and licensed private investigator.