No I did not send a link.i mentioned that Trane has several factories where they have classes that technicians often take.That the classes are sometimes for only a few days.I also told them about the theory refrigerant could have been used to sedate a victim and that i requested a class schedule for previous years.Classes in Clarksville Tennessee,where I live are only for a few days twice a year,the odds of there being classes at the time of the drowning here or 2 days before or after would be 1 in 26.I also told them that there was a dissapearance in Middlebury and a drowning in Albany that could possibly be related because Trane of Albany contracts work for the university in middlebury Vermont.I also pointed out that the banning of CFC in 1996 for enviromental reasons created a lot of commercial work for technicians .Until someone releases information with the dates of classes and when service or installation work was done at the locations of deaths disappearances and drownings,there is not much more i can do.