Warren McElwain

(via Flickr/bloomsberries)

Edited 9:45 p.m. Sunday to correct spelling of mother's name in second paragraph

After 15 years, the murder of Norma Helmig is again an open case.

Osage Co. prosecutor Amanda Grellner released a statement over the weekend saying that she was dropping murder charges against Norma's son Dale, who was convicted of her death in 1996 and sentenced to life in prison without parole. The paperwork will be filed Monday.

Dale Helmig's conviction status has been on the Missouri news radar since 2005, when his 1996 conviction for murdering his mother was thrown out, citing that jurors were given material during their deliberations that wasn't introduced in trial as evidence.

Today, he could be free on bond. But what happened between 2005 and now? A quick timeline: