I can tell you that we keep the file for two years. If there is another incident, it will be put in the same employee file for which there have been two incidents. When there is a new incident, labour relations keeps the file. They don't destroy anything. Let's say you have a harassment complaint, and then a year later another complaint comes in. Both complaints will remain on file for two years.
On November 29th, 2012. See this statement in context.