"I was defending myself, and unfortunately the person died. I live with that everyday," Carrington said.
She spent 40 years behind bars before being released two years ago when it was declared her juvenile conviction should not keep her in jail for life.
Now, she's advocating others facing life.
"They're changed people. They are not the people they were when they committed their crime. They should be offered the same opportunity as I have," she said.
To show support for people serving life sentences, Carrington joined Tonie Willis with the organization Cut 50 at city hall Tuesday for Philadelphia's Day of Empathy.
"It's so important for us to change legislation, and stop giving people life without parole for nonviolent offenses," Willis said.
State Rep. Jordan Harris was also on hand to talk about prison reform bills recently passed, what's being worked on and what he wants to see done.
"If we do criminal justice smartly, we can save those dollars and cents while still keeping communities safe, while also putting families back together," Harris said.
For Carrington, the day was a step in the right direction for her brothers and sisters behind bars.
"I just look forward to helping them get out of there, that's my goal," she said.