By Jelani Scott The WNBA star received an additional six months in custody following a preliminary hearing in Moscow. WNBA star Brittney Griner’s agent has issued a statement in response to news of the 31-year-old receiving an additional six months in custody following a preliminary hearing in Russia. Griner, who has been detained in the country since her Feb. 7 arrest, was given an extended sentence after appearing in handcuffs before a court in the Moscow suburb of Khimki on Monday. In a series of tweets shared later in the day, Lindsay Kagawa Colas addressed the nature of the proceedings an…