The shooting unfolded in Aurora, Illinois.

Carpenter Greg Zanis travels the U.S. to assemble crosses for shooting victims, and the latest mass shooting was in his hometown of Aurora.

More than 1,500 gathered for a vigil for the five people killed at a manufacturing plant in Aurora, Illinois.

What we know about the five people killed in the Aurora, Illinois mass shooting.

Background checks missed his prior felony conviction which should have precluded him from being able to purchase a gun, according to the employer's parent company.

Investigators uncover new details about the gunman's violent past and his attack on former co-workers in the Illinois factory.

Five people were killed in a shooting at a company in Aurora, Illinois when a man who was being terminated from the company opened fire.

Gary Martin, 45, a longtime employee of the Aurora, Illinois, factory, opened fire during his termination meeting, police said.

The suspect, Gary Martin, 45, was a convicted felon barred from legally possessing a gun.

The alleged shooter, Gary Martin, 45, was being terminated on Friday for a culmination of various workplace rules violations.

The city of Aurora is located about 40 miles east of Chicago.