BERRYHILL, Oklahoma - Wednesday, June 6th marks 20 years since 16-year-old Dena Dean of Tulsa was killed.

The Dean family held a vigil this morning at the Family Fellowship Church at 6105 West 63rd Street in Berryhill to remember their daughter.

Dena's father, Larry Dean believes a Tulsa County Sheriff's Office Cold Case Task Force is close to making an announcement.

Members of the the task force were also at the vigil, in case anyone came by with a possible lead into Dena's disappearance. The task force has a special tip line set up for people to call.  That number is 918-388-7686.

In addition to the Dean murder, the Task Force is investigating 29 additional cold cases. Four of those cases are currently very active. Tipsters can call the Task Force at 918-596-5723.