I recall that he’s actually South Pacific Island heritage or Native American.
He was born there:
Early life
Daniel Holtzclaw was born December 10, 1986, in the U.S. territory of Guam, to Eric Holtzclaw and Kumiko Holtzclaw, who is Japanese. His father is a Lieutenant with the Enid Police Department, Enid is approximately 70 miles north of Oklahoma City.
Holtzclaw graduated from Enid High School in 2005. While there he played football as a linebacker, setting a school record for 25 tackles in a game. He played linebacker at Eastern Michigan University, where he graduated with a degree in criminal law.
Source: Wikipedia