A number of factors contributed to Christian Horner's dismissal from Red Bull, but Max Verstappen's long-term future may have been the biggest.

From an investigation into his management to plummeting car performance, this is everything that preceded the departure of Red Bull boss Christian Horner

After 20 years at the helm of Red Bull Racing, Christian Horner is out as team principal and CEO, effective Wednesday. The bombshell move comes at a tumultuous time for the Formula One team as it struggles to create a competitive car, sitting fourth in the constructors’ standings largely thanks to Max Verstappen’s performances this season.