Rowan's Impossible Case

Thomas Hale is dead. You kneel beside the body. The back of his skull is crushed inward. One precise blow. No hesitation. Whoever did this knew exactly how hard to hit. His glasses lie shattered several feet away. That suggests force. Intent. You notice his right hand clenched tight.
You pry it open. A torn scrap of paper rests in your palm.
Two letters:
E L

Not much. But enough. You pocket it before anyone notices.