The trial date of a suspected shooter who exchanged hostile words with a victim was put in doubt when the defendant requested new counsel in a hearing before DC Superior Court Judge Carmen MdLean on May 5. Dante Carthens, 45, is charged with aggravated assault knowingly-grave risk while armed and possession of a firearm in crime of violence. According to court documents, the incident occurred at a get together on the 700 block of 51st Street…