Threats aimed at Minnesota dentist who hunted Cecil the lion

Heavy criticism and even threats have been aimed at the Minnesota dentist who hunted a beloved lion in Zimbabwe.

Even some celebrities have openly criticized Dr. Walter Palmer.

Actress Mia Farrow reportedly tweeted and then deleted the dentist's business address. Late night talk show host Jimmy Kimmel blasted Palmer during his show.

Outside Palmer's office in Bloomington is a display of stuffed toy lions and signs calling Palmer a 'killer.'

Zimbabwean police said they continue to search for Palmer who shot the well-known, protected lion with a crossbow in a killing that has outraged conservationists and others.

Palmer allegedly paid $50,000 to kill the lion.

Various media outlets reported that Palmer issued an apology to his patients for the killing.

It reads in part: "I had no idea that the lion I took was a known, local favorite, was collared and part of a study until the end of the hunt. I relied on the expertise of my local professional guides to ensure a legal hunt."

Two Zimbabwean men appeared in court Wednesday for allegedly helping with the hunt.

Palmer faces poaching charges, according to police spokeswoman Charity Charamba.