When Shatter tears off some adhesive tape in his hotel room to stick an envelope to his body, there is hardly any spare tape on the left side of the package. When Shatter goes to remove the envelope in Leber's office, there is now considerably more tape on the same side.
Rattwood, the Security and Narcotics agent, tells Shatter that the papers he stole give the locations of labs where raw opium is turned into high-grade cocaine. Cocaine is not made from opium.
At the conclusion of the brief car chase when Cushing's men surround Whitman, the reflection of the boom mic is clearly visible on the roof of his car.