Robert “Bobby” E. Crimo III, the person of interest identified by police after Monday’s shooting in a Chicago

Crimo’s most recent video posted to YouTube showed him in the aftermath of a school shooting

The YouTube account that hosted his videos, which had previously been accessible to the public, was unavailable Monday night.

Robert E Crimo III, known as Bobby, is white and just 22 years old

It is the third major mass shooting in the United States since May.

In Washington last night, a moment of silence and a hastily rewritten 4th of July speech by the American president.