Snakes "see" the world through their tongue, through the use of chemo-receptors, they "taste" the air.
Rogan, the San Padre Policeman, who happens to be in the pay of the Motorcycle Club (MC), said "it would be hard to look the other way" with respect to the body in the trunk. In legal parlance, he is considered an accessory after the fact, for rendering assistance to a criminal enterprise, and the very fact of ignoring criminal behavior is known as "willful blindness," for failing to take police action.
In one scene, EZ arrives at his bike and sees "RM-237." A different Room 237 is also famously referenced in The Shining (1980).