Even investigators with years experience under their belts can fall into the trap of false assumptions PolLt Col Pitsanu Puangprom, deputysuperin tendent of Krabi provincial police station knows this only too well. Last week when Pol Lt Col Pitsanu led an investigation into the murder of local businessman Prasit Charungnoo, all the initial theories proved to be a fallacy The 51-year-old victim was an influential person shot dead on his way home in Kra bi's Ao Luk district last Tuesday. His body was found near his vehicle, parked just 200 metres away from his house. Prasit was the president of the provincial Cooperatives Palm Plantation and the village head for Moo 5 in tambon Kiriwong, Plai Phraya district.