Who is leading the investigation into the aviation crash in Washington?

The Transportation Safety Board of Canada appears to be leading the investigation into the Washington aviation incident. The transcript indicates that officials are adhering strictly to protocol where only designated investigators can comment on an active investigation. Tom Costello notes that authorities are 'sticking to the letter of the law' regarding communication about the case, suggesting a formal investigation process is underway. The briefing mentioned was described as 'light on details,' which is consistent with early-stage aviation accident investigations where information is carefully controlled.