After graduating from Victoria University Peter was employed by the DSIR, (later ESR) as a forensic scientist specializing in forensic biology. During this career he appeared as an expert witness in many criminal cases. He became an expert in crime scene examination and blood pattern interpretation and was scientific advisor for the first Scene of Crime Officers (SOCO’s) course for the NZ Police. In 1988 he trained at the Home Office in Britain to introduce DNA as a forensic science tool in New Zealand.
In 1997 Peter became an independent forensic science consultant offering the following areas of expertise:
• Crime Scene evaluation and forensic photography.
• Re-examining scientific evidence – Blood spatter and DNA results.
• Identification of human blood and semen stains.