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CHICAGO — Protesters shut down a news conference that Chicago Police Supt. Eddie Johnson was going to hold Friday afternoon.

Johnson was going to make a statement following the release of nine videos from the fatal police shooting of Paul O’Neal. The 18-year-old died from a gunshot wound to the back.

Once Johnson walked out of Chicago Police Headquarters to a podium, the protesters started speaking to the cameras and at Johnson. The protesters kept talking, and after a few minutes, Johnson simply walked back into police headquarters.

Earlier Friday, Johnson released a statement about the video release:

I applaud the Independent Police Review Authority (IPRA) and Chief Administrator Sharon Fairley for being so transparent and open with the video release and I want to pledge the full cooperation of the Chicago Police Department during this investigation.

My promise to the people of Chicago is that we will be guided by the facts and should wrongdoing be discovered; individuals will be held accountable for their actions.

The shooting of Mr. O’Neal has raised a lot of questions about whether departmental policies were followed. While IPRA conducts a thorough investigation, we will not wait to look for ways we can learn from this incident.

I’ve challenged my team to take a hard look at the training and tactics from this incident, including looking at national best practices on use of force to determine how we can best serve our officers so that they can best serve the people of the city.

You can expect this department to be open and honest about what we discover and we will work together with our community partners to implement solutions.

In order to work toward making a better department we must acknowledge the things we can do better and that work starts today.