Stevie Wonder's nephew is facing felony charges of extortion against the singer, reports the Los Angeles Times. Alpha Lorenzo Walker, 38, and his girlfriend Tamara Eileen Diaz, 38, are accused of threatening to reveal information about Wonder if he did not pay the pair a substantial amount of money. Police say the couple attempted to finagle $5 million before dropping their demands down to $10,000. Walker and Diaz were arrested May 2nd after undercover LAPD officers posed as Wonder's representatives. Both were scheduled for a preliminary hearing yesterday.