St. Anthony police arrested eight suspects after the incident.
There are protests throughout the Twin Cities ahead of curfew Sunday night.
The Friday morning blaze displaced a number of residents, including a mom and her small child.
The boy has asthma and doesn't have his medication.
Tom Bielenberg has owned Micawber's since 2003.
He's known by the hacker name 'Vigilance.'
Among the victims was his girlfriend and her mother.
He confronted police outside the house, and was eventually subdued.