This year marks the 25th anniversary of a few Unsolved Mysteries cases. The dates next to the names are the dates when the disappearances/murders/offenses happened, not when they aired on TV. Let me know if I missed anybody.

Michael Owen (died in a car accident, January 3, 1998)
Leonard Dirickson (missing, March 14, 1998)
Amy Bradley (missing, March 24, 1998)
Dale Claxton (Cortez, CO police officer murdered by 3 domestic terrorists, May 29, 1998)
Jayson Artis (allegedly killed by the Tijuana police, August 2, 1998)
Chansami and Abby Thammavong (killed when their family's U-Haul was ran off the road, August 6, 1998)
Tina Cremer (murdered by her ex-husband, David Kemp, August 10, 1998)
Charles Barker (murdered by his new girlfriend, Hazel Head, August 28, 1998)
Nancy Daddysman (murdered, September 4, 1998)
Ted Binion (Las Vegas millionaire allegedly killed by his girlfriend and her lover (September 17, 1998)

Did I miss any occurrences?