A teenager in Mississippi knew the elderly couple he's accused of killing before sparking a standoff with law enforcement, according to new testimony in court. Cordarius Hobbs, 17, is charged with killing 74-year-old Billy Blair and his 71-year-old wife Virginia Carol Blair during a home break-in on June 3 in Mendenhall, Mississippi. Family members of Hobbs testified during the Thursday preliminary hearing that he knew the couple.