When you watch NCIS Season 15 Episode 12 online, a Navy lieutenant's parents arrive at her home to surprise her on her birthday, only to discover a horrific surprise of their own, in the form of their daughter's body hanging from the ceiling from an apparent suicide. Gibbs and his team arrive to investigate and determine whether the lieutenat's death was suicide or murder. Making the case difficult was that by all outward appearances, the lieutenant was happy and enjoying life, including looking forward to her wedding in the not-too-distant future. They are aided in their investigation, fortunately, by her extensive video diaries, recorded pretty much everyday for five years. But as they begin to dig deeper into her life, they discover strange discrepencies. If she was so dedicated to celibacy with her fiance until their marriage, who did she have sex with in the 72 hours prior to her death? Who is the mysterious "Rita" she called before she died? And why did she have tranquilizers in her system when she died? It's up to the NCIS team to put the pieces together and find out the truth about her death. Was it suicide? Or was it murder? Find out what happens when you watch NCIS Season 15 Episode 12 online!