NCIS star Mark Harmon navigated a tumultuous relationship with his late sister, Kristin Nelson. Kristin, known for her marriage to Ricky Nelson and struggles with addiction, faced a rocky journey. After divorcing Ricky in 1982, she battled substance abuse, leading to custody issues over her son Sam.
In 1985, Mark and his wife Pam took custody of Sam, sparking a family feud. Mark later intervened, convincing Kristin to enter rehab in 1987. Despite their past, Sam and Kristin developed a close bond.
Kristin passed away in 2018 at 72, and her daughter Tracy remembered her through an emotional tribute, emphasizing Kristin’s silent expressions of love.
