By Dave Jordan, NEWS 9

OKLAHOMA CITY -- A teenager involved in a fatal pharmacy attempted robbery has entered into a plea deal with prosecutors after pleading guilty to first-degree murder and conspiracy to commit a robbery with a firearm.

Jevontai Ingram, 15, has been at a state juvenile facility since May of last year, and under his plea deal he will stay there at least until he's 18-years-old. The teen must enter into a treatment program, but if he fails to complete it, prosecutors can push for a life sentence.

Anthony D. Morrison, 43, and Emanuel D. Mitchell, 32, allegedly planned the robbery that took place May 19 at the Reliable Discount Pharmacy in Oklahoma City that resulted in the death of 16-year-old Antwun "Speedy" Parker. Parker was shot at and killed during the attempted robbery by pharmacist Jerome Ersland.

Both Morrison and Mitchell are also charged with first-degree murder as well as Ersland after being accused of using excessive force to stop the crime.

Under Ingram's plea deal with prosecutors, he is also required to testify against Morrison and Mitchell. Their trial is expected to start later this year.

Both of Ingram's parents were in the courtroom Friday. His father was quiet, and his mother was crying throughout the entire sentencing. Both declined to comment.