McDonald was holding a knife at the time of the shooting and the drug PCP was found in his bloodstream, officials have said.
According to prosecutors, McDonald was stealing radios from trucks near 41st and Pulaski shortly before 10 p.m. on Oct. 20, 2014. When responding officers requested backup with a Taser, Van Dyke and his partner responded, Assistant State's Attorney William Delaney said during the bond hearing Tuesday. Neither Van Dyke nor his partner indicated they had a Taser.
Van Dyke was on the scene for less than 30 seconds before he stepped out of his marked SUV and started shooting at Laquan at 9:57 p.m., Delaney said. At the time, the teen was about 10 feet away.
Van Dyke took a step toward McDonald and continued to shoot, emptying his gun, prosecutors said. When Van Dyke paused to reload, his partner told him to stop shooting as the partner went to check on Laquan and kick away the teen's knife, Delaney said.
The partner could hear McDonald struggling to breathe, according to prosecutors. Though McDonald had a pulse on the scene, he was dead by the time he reached a nearby hospital.
There were at least eight other police officers on the scene, Delaney said, but none of them fired at Laquan because they didn't think there was a reason to do so.
Authorities said McDonald was carrying a knife with a 3-inch folding blade. At one point, he slashed the tire of a police car, but witnesses said McDonald never lunged at officers and appeared to be trying to get away from police when Van Dyke shot him, Delaney said.Alvarez on Tuesday in an earlier press conference and said the impending release of dash-cam footage pushed up her timeline to file charges.