When a person goes missing, law enforcement is often stuck in a problematic position. Without a body, it can be difficult to prove a crime existed. That means justice, however obvious it may seem, is often not achieved.

For the 2001 missing persons case of Pamela Dunn, that's not exactly the story.

While Dunn has not been located, her ex-boyfriend, Dave Asmussen, is serving a life sentence for a 2006 conviction related to her kidnapping. That sentencing came on the heels of a stalking conviction, which landed him in prison in 2004 for 40 months.

While it's not the slam dunk investigators are content with, it's the successful execution of a strategy intended to keep their main suspect behind bars while continuing to collect evidence related to the disappearance of Dunn.

This is part 1 of a two-part series related to the disappearance of Pamela Dunn.