A woman has been arrested after a witness in a murder trial was struck by a car outside the courthouse. Shaquilla Stafford, 44, was arrested in connection with the incident. The witness, Queva Stafford, was injured. Queva Stafford is the sister of the man who was killed. Las Vegas police suspect she was struck intentionally while she walked on the sidewalk. Shaquilla Stafford also faces weapon charges. She posted bond and is no longer in custody.