A 54-YEAR-OLD MAN. WE’RE TOLD BRITAIN KNEW THE VICTIM BUT THE NAME HAS NOT BEEN RELEASED. NEW TONIGHT, A PAIR OF DENVER POT DISPENSARIES HAVE RECALLED THEIR PRODUCTS AFTER LEARNING THAT UNAPPROVED PESTICIDES MAY HAVE BEEN USED. HOWARD NATHAN JOINS US LIVE IN DENVER. HOW DID THIS HAPPEN? Reporter: WELL, TOM, THIS IS SACRED SEED BEHIND ME. INSIDE IS A GROW HOUSE. THE CEO TELLS ME THE EMPLOYEES ARE ONLY SUPPOSED TO SPRAY PESTICIDES THREE TIMES A WEEK. HOWEVER, HE TELLS ME ONE OF THE EMPLOYEES USED PESTICIDES NOT APPROVED BY THE STATE. HE PULLED HIS POT WORTH SEVERAL THOUSANDS OF DOLLARS FOR MORE PRODUCT SAFETY TESTING. A SAMPLE TESTED POSITIVE FOR RESIDUE OF THREE PESTICIDES THE STATE SAYS CANNOT BE USED LEGALLY ON MARIJUANA. THE DENVER CITY/COUNTY HEALTH DEPARTMENT EMPLOYEE EXPLAINS WHAT’S BEHIND THE RECALL. SENATE’S VERY LIKELY THERE IS NOT AN ACUTE REACTION, BECAUSE WE DON’T SEE PEOPLE GOING TO THE HOSPITAL EVERY DAY. HOWEVER, WE REALLY DON’T HAVE ANY IDEA ABOUT WHAT THE LONG- TERM IMPACTS MIGHT BE THROUGH REPETITIVE USE. Reporter: DENVER RECREATIONAL AND SACRED SEED VOLUNTARILY RECALLED THEIR PRODUCT. WHAT YOU ARE LOOKING AT IS A SHELF THAT HAS FOUR STRAINS OF CAN ANY BIRKS AND WE NORMALLY HAVE ROUGHLY 40 STRAINS. SO WE PULLED 90% OF THE PRODUCT OFF THE SHELF. Reporter: WHAT HAPPENED TO HIS POT? JEREMY SAYS AN EMPLOYEE TOOK A SHORTCUT AND USED THE WRONG PESTICIDE. I WOULD HAVE NEVER HIRED THE GUY HAD I KNOWN THIS WAS GOING TO HAPPEN BUT WE HAD TO REASON TO BELIEVE THIS WAS SOMETHING HE WAS CAPABLE OF. Reporter: JAMES OFFERED NO EXPLANATION. HE TOLD ME HE’S WORKING WITH THE CITY AND STATE TO FIND OUT HOW THE WRONG PESTICIDE INFILTRATED HIS PRODUCT. BUT WHAT HAPPENED TO THAT SACRED SEED EMPLOYEE WHO KNOWINGLY VIOLATED COMPANY GUIDELINES? HE LOST HIS JOB. Reporter: BOTH OF THOSE MARIJUANA SHOPS HOPE TO GET THE ALL CLEAR ON MONDAY OR SO. IN THE MEANTIME IF YOU THINK YOU GOT SOME PRODUCT THAT MIGHT NOT BE 100% CORRECT, RETURN THEM TO THE STORES. IN THE MEANTIME THIS ALL MAY BEA MOOT POINT COME EARLY NEXT YEAR WHEN MANDATORY ROUTINE