Lion kill furor grows: US officials seek to interview hunter dentist, White House gets extradition petition

Where in the world is Walter Palmer?

That's what officials on two continents want to know as they investigate the Minnesota dentist's killing of a beloved African lion amid a growing international outcry that now has reached the White House.

U.S. Fish and Wildlife Service investigators reportedly have visited Palmer's home and office to question him about the killing of Cecil, a lion who had a rare black mane and who was made famous in Zimbabwe tourist campaigns.

Ed Grace, chief law enforcement officer for Fish and Wildlif