Tuesday, September 20, 2011

FORENSICS: IT’S WHAT YOU KNOW AT THE TIME THAT COUNTS

When I was a young homicide detective we had a case where a young woman had been strangled and her body was left in a vacant field.  The body was naked except for her panties.  An examination of those panties revealed some small plant-like material inside them.  My partner and I took the material to a botany professor at a very prestigious university nearby.  After examining the residue, he advised us it was pink heather.  Additionally he told us it was a small plant that grows back east, not in southern California.  He also said it was it was used for garnishment in floral displays.  This really caught our attention.  The victim’s boyfriend was employed at the time at a flower shop.  Once we had this information we raced up to the flower shop and detained the boyfriend.  We took him back to the station where he eventually confessed to the murder.  The next day we got a call from the botany professor.  He was extremely apologetic and advised us that he had been incorrect in his analysis.  During the criminal trial of the boyfriend, the court ruled that the confession was admissible because the detectives were acting on the information they knew at the time, which was based on the expert botany professor’s analysis.  Every time I go into a flower shop, I still think of that case and pink heather.