A Waldorf teenager charged in the fatal shootings of a D.C. cabdriver and a Charles County woman will be prosecuted first in the District, authorities said.

Joshua T. Mebane, 17, who is being held in the D.C. jail, is charged with murder in the Nov. 7 death of cabbie Quadar Muhammad, who was shot in the head in his taxi off Brentwood Parkway NE in an apparent robbery.

Police said Mebane and his girlfriend, Linda Bury, were passengers in the cab when the killing occurred.

“Since the District currently has Mr. Mebane in their jail for an equally serious case, they will prosecute their case first,” Charles County State’s Attorney Tony Covington said in a statement Wednesday.

“As soon as his guilt or innocence has been determined in D.C., he will be brought to Charles County to stand trial on our charges,” Covington said. “I am probably being overly optimistic, but I am hoping to have Mr. Mebane in Charles County around summertime.”

Shortly after Mebane and Bury were charged as adults in Muhammad’s death, Charles County authorities obtained an arrest warrant accusing Mebane of murder and other crimes in the killing of Teresa Ann Bass, 40, on Oct. 26.in Waldorf.

Investigators said Bass and her husband, Jerry Bass, were walking their dog on a footpath when Mebane allegedly shot them for no apparent reason. Jerry Bass survived his wounds.

On Monday, a grand jury in Charles County indicted Mebane on numerous charges, including first-degree murder, attempted murder and first-degree assault.

Covington’s office charged Mebane as an adult. He could be sentenced to life terms in prison plus 68 years if convicted of all the charges against him in Charles County, authorities said.