It was at two o'clock on Monday that the ex-boyfriend, who constantly denied any wrongdoing, was sentenced to life in prison for murder and breach of the peace. Jim Westerberg is satisfied with how the district court reasoned in its assessment.

- They highlight the same aggravating factor that we highlighted in our plea, so we are satisfied with the verdict, he says.

The convicted man, and his lawyer, now have the opportunity to appeal the district court's ruling. And in that case, Jim Westerberg, and the police, may need to continue investigating Wilma's case.

Start the clip above to hear him tell how - and why - they do it.