The Chicago Police Department released documents late Friday evening from the investigation of the police shooting of 17-year-old Laquan McDonald, which reveal drastic differences in what officers said took place during the shooting compared to what is actually seen in video footage.

Last month, the city published video footage of McDonald's shooting death more than a year after the incident took place on Oct. 20, 2014. In the dash cam video, the African-American teen is seen walking in the middle of a two-way street as multiple police cars drive toward him. Then, just six seconds after arriving on the scene, Officer Jason Van Dyke jumps out of his vehicle and open fires at McDonald as he appears to be veering away from the cops. A criminal complaint filed in Cook County Circuit Court said the teen was armed with a knife and had PCP in his system.

Just hours before the video was finally released, Van Dyke was charged with first-degree murder for fatally shooting McDonald 16 times. A week later, Chicago Police Superintendent Garry McCarthy was fired in wake of the public outrage over the mishandling of the shooting. Protesters also claim that police and prosecutors tried to cover up McDonald's death by deleting 86-minutes of video footage from a nearby Burger King security camera.

Newly released documents show that the officers at the scene of the shooting described a dramatically different sequence of events leading up to McDonald's death. According to the records, Van Dyke and five other cops claim that McDonald was advancing toward officers in a threatening way, despite the fact that the video shows him walking away.

"McDonald was holding the knife in his right hand, in an underhand grip, with the blade pointed forward," the report states, according to The Chicago Tribune. "He was swinging the knife in an aggressive, exaggerated manner."

Van Dyke also told investigators that McDonald "raised the knife across his chest and over his shoulder, pointing the knife" at him before he opened fire.

Officers went on to say that McDonald seemed determined to attack the cops even after he had been shot down, which is why Van Dyke continued to fire his weapon.

"McDonald fell to the ground but continued to move and continued to grasp the knife, refusing to let go of it," states the police report. "Van Dyke continued firing his weapon at McDonald continued moving on the ground, attempting to get up, while still armed with the knife."

According to Van Dyke's account, he repeatedly ordered McDonald to drop the knife. The dash cam video, however, was released without audio, so there is no way to see if that statement is true or false.

The department officially recorded the shooting as a justifiable homicide in December 2014.