The data is likely to help civil suits against the gun industry around the country.
Several other rulings have also gone against the gun industry.
But the gun industry has much less money to fight an expensive courtroom war.
With increasing production of butter, workers from the gun industry will move to it.
Chicago is the second major city to consider suing the gun industry.
This is not the fault of the American gun industry.
The ultimate goal, the group claims, is to protect the financial future of the gun industry.
"I'm not looking to put the gun industry out of business," he said.
"The gun industry must be made to value life over profit."
The decision also came within days of two unfavorable court decisions for the gun industry.