When the deserter was brought in as a murder suspect, Agent Mackey's bias and antagonism is so obvious and over the top that any credible law enforcement agency would have immediately removed her from the case to avoid giving a defense attorney an easy way to call the investigation into question.
Several times, the NCIS agents said that the sailor was AWOL. The US Navy does not use this term. Instead, the Navy uses the term UA for "unauthorized absence".