CHICAGO (AP) — The latest on the aftermath of the shooting of a black teenager by a white Chicago police officer (all times local):

9:15 a.m.

Chicago police say that four people were arrested during the second night of largely peaceful demonstrations following the release of a video showing last year's shooting death of 17-year-old Laquan McDonald by a police officer.

A total of eight people have been arrested during two days of marches and rallies around the city.

Wednesday's arrests included three Chicago residents charged with misdemeanor counts of resisting a police officer and one woman from Cedar Lake, Indiana, who was charged with a misdemeanor of damage to public property.

McDonald, who was black, was shot 16 times in 2014. Officer Jason Van Dyke, who is white, has been charged with first-degree murder in the killing.

The most noteworthy arrest since protests began Tuesday night was a community activist named Malcolm London, for whom a judge dismissed a charge of aggravated battery of a police officer.

___

8:05 a.m.

Federal authorities say they're still investigating the fatal shooting of black teenager Laquan McDonald by a white Chicago police officer last year.

The Wednesday night news release from the U.S. Attorney's office comes after Cook County prosecutors charged Officer Jason Van Dyke with first-degree murder in the death of the 17-year-old McDonald, whom he shot 16 times. City officials released the police dashcam video of the shooting on Tuesday.

Cook County State's Attorney Anita Alvarez said Tuesday she'd hoped to make a joint announcement with federal authorities about charges against Van Dyke but decided to charge him earlier in the hopes of calming what she knew would be an angry response to the video.

Experts have said that Van Dyke could be also charged with violating McDonald's civil rights.

___

7:45 a.m.

Officials of Chicago Public Schools say they're preparing for the fallout resulting from the video showing a police officer shooting 17-year-old Laquan McDonald.

The Chicago Tribune reports (http://trib.in/1IhGV0f ) that parents have received a letter from Chief Education Officer Janice Jackson assuring them the video won't be shown in schools. Jackson also said it is likely students will discuss the video when they return to classrooms Monday.

A six-page "tool kit" was distributed to teachers with exercises designed to help them and their students deal with McDonald's death and the murder charges filed against Officer Jason Van Dyke.

Teachers union official Jesse Sharkey criticizes the kid for not including a "lesson about the lack of political courage" and "political corruption."