If you are intending to sound like you are schizophrenic then you withhold the explanations until after the evidence is presented.
If you are intending to persuade others then you give one of the possible explanations before you drop the evidence.
For those who have been conditioned to only accept one official explanation from authority figures, cognitive bias prevents the full picture from being shared and understood.
I like sounding schizophrenic because it fucks with their heads more. When the light bulb turns on, they get all the information at once but you don't have to wait until you have all the evidence to start distributing it.
If I were to travel to some isolated native tribe I would bring glowsticks.