ST. LOUIS, MO (KTVI)-- Dozens of people, including the chief of police and mayor, gathered in front of St. Louis City Hall for a rally against gun violence Wednesday.
Tami Inkley was among the people at the rally.
Her 18-year-old son, Matthew Pellegrini, was shot in the head by Kevin Beindorff in 2012.
"Kevin shattered out lives and we will never be normal," Inkley said.
Before the rally Inkley learned that her son's killer will spend a maximum of seven years in prison.
"That is ridiculous," she said. "You put a gun to someone's head and murder them in cold blood and seven years."
Beindorff was charged with involuntary manslaughter and armed criminal action, and he reached a plea deal with the St. Louis Circuit Attorney's Office.
Under the law, the maximum penalty for involuntary manslaughter is seven years in prison. The maximum penalty for armed criminal action is three years to life in prison.
Inkley wanted Beindorff to be charged with murder and for the case to go to trial.
The St. Louis Circuit Attorney's office released the following statement about the case:
"While the impact of this tragedy on Mr. Pellegrini's family has been tremendous, under our legal system charging decisions and plea agreements are made by objective prosecutors based on evidence available and the application of the laws of the State of Missouri."
"It is not justice," Inkley said. "I tried so hard, and he (Matthew) knows I did."
During the rally, Mayor Francis Slay told people that he was working with others on a "court docket" for people who commit crimes with guns.
It would help prosecutors secure longer sentences and more expensive bonds for those use commit crimes with guns.
"That is good, but I want action," Inkley said.