Update: Roy Oliver, the former police officer who a jury convicted of the 2017 shooting death of Jordan Edwards, has been sentenced to 15 years in prison, BBC reports.The sentencing phase of his trial began after his guilty verdict was declared on Tuesday and continued into Wednesday. After 7 and a half years, he may be eligible for parole. 

Oliver's conviction marks the first conviction of an on-duty Dallas officer since 1973, according to Salon.

Original: Former Texas police officer Roy Oliver has been found guilty by a jury of the murder of 15-year-old Jordan Edwards, reports the Associated Press. 

Edwards and his 16-year-old brother were on their way home in Balch Springs, a suburb in Dallas, Texas, in April 2017 when Oliver killed Edwards. The death was ruled a homicide by the Dallas County medical examiner.

Oliver, at the time an officer with the Balch Springs Police Department, fired into the car Edwards was in with a rifle. He was fired by the department not long after the shooting.

The jury declared its guilty verdict on the second day of deliberations in a Dallas County courtroom on Tuesday. Jurors deliberated for 12 hours total, according to the Dallas Morning News. 

Despite Oliver's testimony that he fired the weapon because he thought his partner was in danger, his partner testified he didn't fear for his life and believed using such force was unnecessary. The two officers had been called to the scene due to a noise complaint.

Oliver received a "not guilty" verdict on two counts of aggravated assault in relation to the shooting. 

"I'm happy, very happy. It's been a long time, a hard year," said Jordan's father, Odell Edwards, who said he wanted to "jump up and down" after hearing the verdict, according to NBC News.

Now, check these out: 

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Former Police Officer Who Killed Jordan Edwards Has Been Indicted For Murder