A suburban Dallas police officer who fatally shot a 15-year-old boy in a moving vehicle has been fired.

Roy Oliver, a six-year veteran with the department in Balch Springs, Texas, was fired Tuesday, Police Chief Jonathan Haber announced in a press conference.

Haber said that Oliver can appeal the decision and would only say that the officer violated department policies in the shooting death of 15-year-old Jordan Edwards.

Officer Roy Oliver Balch Springs Police Department Facebook

"After reviewing the findings I have made the decision to terminate Roy Oliver's employment with the Balch Springs Police Department," Haber told reporters. "My department will continue to be responsive, transparent and accountable."

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Edwards was a high school freshman and football player who was fatally shot in the head while leaving a house party in Balch Springs.

Police initially claimed the vehicle, in which Edwards was a passenger, "aggressively" backed up toward the officers, but Haber corrected the record on Monday, saying police body cam video showed the vehicle driving away when Oliver opened fire -- killing the teenager.

Edwards' family released a statement shortly after the announcement, calling for charges against the officer.

"We are grateful the decision has been made to terminate the officer responsible for Jordan's murder," the statement read. "Over the past 24 hours Chief Haber has made commendable strides toward justice. However, there remains a long road ahead. We anxiously await this officer's identification and arrest for the crime of murder."

Lee Merritt, the family's attorney, told CBS News that his clients hope the teen's death leads to "significant change in policy and procedures in the culture so that no family has to endure what they have to endure."

The Dallas County district attorney's office and Dallas County sheriff's office are investigating the case.