U.S. sportsman Darren Sharper has been charged with two counts of sexual assault in Arizona stemming from allegations he raped two women in November (13). Law officials in Tempe have decided there is enough evidence in an investigation launched by the Maricopa County Attorney's Office to charge the retired American football star with a crime, according to TMZ.com. Police reports suggest two women claim Sharper spiked their drinks and sexually assaulted them at their apartment, and detectives have allegedly recovered the cup the former Green Bay Packers star used to serve one of the women - and it tested positive for traces of Ambien. Arizona officials tell TMZ.com that Sharper has been charged with two counts of sexual assault and three counts of administering dangerous drugs. The embattled sportsman surrendered to police in Los Angeles on 27 February (14) after an arrest warrant was issued by authorities in New Orleans, Louisiana in connection with two additional charges of rape. The retired sportsman turned himself in to cops hours after representatives at the Orleans Parish district attorney's office announced that the 38 year old and his associate Erik Nunez had each been hit with two counts of aggravated rape. The charges relate to an incident which allegedly took place with two other women in a New Orleans apartment on 23 September (13). If found guilty of those charges, the suspects could face life in prison without parole. The incidents are the latest legal woes for Sharper - last month (Feb14), he also pleaded not guilty to claims he drugged and then raped two women in Los Angeles as part of an ongoing investigation. If convicted in that case, he faces more than 30 years behind bars.