Field investigations are often only triggered following the identification of a specific pesticide as the likely cause of poisoning. However field investigations may be initiated following either notification, or after post-mortem examination, if sufficient evidence of pesticide involvement is available. Field investigations are carried out by the RPID Staff, located in Area Offices throughout Scotland. On occasions, these officials may work in joint operations with Police Wildlife Crime Officers. Further animal samples or other relevant materials obtained during the field investigation are submitted to SASA for analysis.