Alejandro Rivera, a high-ranking official of the Mexican Justice Department, appear in the episode "Spider and the Fly". In this episode, Gibbs manipulates Alejandro Rivera into killing Paloma, and Alejandro is subsequently arrested. Shortly thereafter, Director Vance files Abby's report proving that Gibbs killed Hernandez deep in the NCIS evidence room. When Gibbs comes under investigation in the Season 10 finale "Damned If You Do", Vance retrieves the report and shreds it, deciding to permanently bury all leads to the truth so that Gibbs will not be found and convicted of murder. Marriages Gibbs has been married four times, and divorced three (his first wife was killed). Shannon Fielding was Gibbs' first wife. In the episode "Heartland", Gibbs is revealed by flashbacks to have met Shannon (portrayed in that episode by Aviva Baumann) while waiting at the Stillwater train platform in summer of 1972, where she tells him about her rules for life that would inspire a similar set of Gibbs' own that he now teaches to his subordinate agents at NCIS. In "Hiatus (Part II)", they were stated to have married in December 1981, and Kelly was born sometime in 1982. He was unable to be at the birth of Kelly as he was deployed. Shannon, along with their eight-year-old daughter Kelly, was murdered by a Mexican drug dealer named Pedro Hernandez on the last official day of Operation Desert Storm. Gibbs was an active member of the Marine Corps at the time and was still overseas when they were killed. In "Hiatus (Part II)" Director Shepard tells Dr. Donald "Ducky" Mallard that Shannon had witnessed a murder of a Marine at Camp Pendleton, where Gibbs was based at that time. Shannon had identified the murderer as Mexican-born drug dealer Pedro Hernandez. Afterwards, Hernandez shot the NIS agent driving Shannon and Kelly in a minivan and the subsequent crash took their lives. Gibbs retaliated by seeking out Pedro and assassinating him, leaving behind an empty shell casing as a message. Paloma Reynosa later indicated he left a live round. This secret remained with him for 20 years until it came to light when Abby discovered the truth through a forensic investigation. Diane Sterling (Melinda McGraw) was Gibbs' second wife. After divorcing Gibbs she married FBI Senior Special Agent Tobias Fornell (Joe Spano). However, this marriage was only slightly more positive than her last, and ultimately failed. As she did