Three robbery suspects were accused Friday in a first-degree murder charge of responsibility for the fatal drug store shooting of an alleged accomplice. Police report the youngest, a 14-year-old boy, confessed his involvement in the heist. The three are charged with murder even though a pharmacist fired the fatal shots that killed Antwun "Speedy” Parker, 16, on May 19 at the Reliable Discount Pharmacy in south Oklahoma City. They will be prosecuted separately from the pharmacist, Jerome Jay Ersland, who is accused in an earlier first-degree murder charge of going too far, Oklahoma County District Attorney David Prater said. The new charge against Jevontia Ingram, 14, Emanuel Dewayne Mitchell, 31, and Anthony Devale Morrison, 43, is the latest twist in the case. All are from Oklahoma City. They are not accused of firing any shots themselves. The two adults allegedly stayed outside. The three are charged under Oklahoma’s felony murder law, which says a robber, kidnapper, rapist, drug trafficker or certain other felons can be guilty of first-degree murder if someone dies as a result of the crime even if the death wasn’t intentional. Prater on Wednesday said, "Because of the acts of the defendant we’ve charged in this case, Mr. Ersland, I don’t feel we’d be justified in filing a felony murder charge against the other robber in the case.” Prater said Friday he reversed his position after further legal research. He said no one pressured him to file the new murder case. Ingram and Mitchell have been arrested. Police Friday were searching for Morrison. All three also are charged with conspiracy to commit armed robbery. The two men are charged with possession of a gun after a felony conviction. Both men have been in prison for robbery and assault. The boy told police he and his friend, Parker, attempted the robbery after Mitchell and Morrison asked for their help, a police detective reported in an affidavit attached to the charge. The boy said the two men contacted him May 19. Ingram described Morrison as his mother’s friend and Mitchell as Morrison’s cousin. Ingram told police his mother’s friend gave him a gun with no bullets, clothes to wear during the robbery and "advised them what to demand inside the store,” according to the detective’s affidavit. Ingram said Mitchell drove him and Parker to the pharmacy in a Honda stolen two days before. He said Morrison and Morrison’s girlfriend were in another Honda parked outside. According to the court affidavit, "Ingram stated during the robbery a male employee shot two times towards him and Parker and he ran out of the pharmacy. Ingram stated he did not know Parker had been shot until later in the evening. Ingram stated as he ran from the store, the male employee chased after him and fired approximately three shots at him. Ingram stated Morrison drove away and Ingram continued to run.” He said the plan had been for his mother’s friend to follow Mitchell after the robbery then pick him, Mitchell and Parker up so they could leave behind the stolen car. He said Mitchell did drive up as he ran from the pharmacy but that Mitchell jumped out of the stolen car. The boy said he threw the gun in the stolen Honda’s back seat and saw Mitchell return to the car and grab the gun. Mitchell was arrested after the robbery. The boy was arrested Thursday.