Protesters in Chicago vented their fury at a Christmas tree at Millennium Park, destroying it after a black teenager was shot by a police officer.

The demonstrators attacked the tree Tuesday, pulling lights and destroying other parts of the decoration, according to Fox 32 News. Police arrested two people but were later released.

Demonstrations were held in Chicago after a dashcam video showed police officer Jason Van Dyke shooting 17-year-old Laquan McDonald 16 times on Oct. 20, 2014.

Van Dyke is facing first-degree murder charges because of the shooting.

Cook County State Attorney Anita Alvarez described the dashcam video after Van Dyke appeared in Court.

"At 9:57:36, McDonald has crossed over the white lane divider away from the officers, and Officer Van Dyke has taken at least one step towards McDonald with his weapon drawn. The officer then opened fire on Laquan, whose arm jerks, his body spins around and he falls to the ground. While Laquan is falling to the ground the defendant takes at least one more step towards him, at which point the angle of the dash camera changes and we can no longer see the officer in the frame of the video. Two seconds later, Laquan McDonald is lying on the street on his right side, and the video captures what appears to be two puffs of smoke coming from the ground near his body. These puffs of smoke were later identified as clouds of debris caused by the fired bullets. At 9:57:51, McDonald is still lying on the street and the last visible shot is fired," Alvarez said, according to ABC 7 News.

ABC 7 News reported that on that day, Van Dyke and his partner were at a convenience store parking lot when a call came in and they responded to a situation about a man wielding a knife.

Van Dyke then got out of his car and opened fire. The videos showed McDonald's body on the street after the shooting.