Picture a jury trial for a man accused of arson. No one saw the man light the match (taught the dealers how to make the crack). Yet there is incontrovertible evidence that the man knew and had studied fire science and thus knew that by pouring gasoline onto dry wood and striking a match, that the wood building would burn. There is also incontrovertible evidence that the man brought gasoline, small bits of kindling and a person who liked to play with matches to a large building. There is also hard proof that the man, once a fire had started, deliberately interfered with fire fighters attempting to reach the blaze. Then he brought in lots more gasoline. Not only that but the man provided the match striker with guns and radios which monitored the fire department frequencies so that he could fight off firefighters and continue lighting more fires.
As the building burned, and people died inside, our suspect attempted to cover-up for the match lighter and interfered with law enforcement investigations into his activities. He even lied to Congress, which was alarmed by the damage and the number of deaths. And, being trusted by Congress, our suspect continued to thwart attempts to stop the fire and find the cause.
Such a man would be convicted of arson in a heartbeat.