Why is Obama prosecuting Tim DeChristopher, the gas-lease pranker?

A good question, given all the unprosecuted, indeed celebrated, criminals at high levels-

Tim DeChristopher was convicted at his trial after not being allowed to explain the motives for his prank. Do Motives Matter? The DeChristopher Verdict. The New York Times. By Kirk Johnson.

Inside traders, coal and oil company disaster creators, military contractors break the law with no fear. Two Justices of the Supreme Court plot openly with the Koch Brothers, but who gets convicted? As climate crime continues, who are we sending to jail? Tim DeChristopher? By Bill McKibben. Grist Magazine.

Some people are outraged. Read below (written shortly before his trial).

Why is Obama prosecuting Tim DeChristopher, the gas-lease pranker? Jeremy Bloom. Red, Green, and Blue.