The power of language in leadership positions and social movements is well established. Charismatic Language patterns have been identified as effective for influencing perception and decision-making. This study examines the use of Charismatic Language in a court of law through a randomized survey of different treatments of oral arguments in a homicide case. Results show that Charismatic Language used by the prosecution is less likely to influence a jury and can even dissuade their decision. Additionally, the study finds that Charismatic Language used by a female attorney may hinder the argument's reliability to a jury.