Who was Bill Smith's only enemy according to his lawyer?

According to Smith's lawyer, Ernest Burkhart was the only enemy of Bill Smith.

Explanation:

Bill Smith was admitted in the hospital after the bomb explosion in his house. Tom white called Smith's lawyer to have a conversation with Smith regarding the explosion. Bill told that William K. Hale and Ernest Burkhart are his two enemies in the world.

The trial of Ernest Burkhart for bomb explosion in Smith's house was started by May month in the state court in Pawhuska. Lawyers for Hale were concerned to protect him, because they knew that if he was convicted now then he will be prosecuted in the Roan case too.