Hundreds of people traveled to the town office grounds for a candlelight vigil to honor the young girl.
Marissa was allegedly killed by her mother and stepfather a week ago.
Families whose kids were friends with Kennedy said the community is sad, and also angry.
"To know that my daughter has to go through, and explain to her, it hurts, it's sad. She cries every day," said April Delgreco, who's child was friends with Kennedy.
"It makes me sick to my stomach how any parent could think of doing that to a child. It wasn't just spanking or over-spanking, it was torture," she said.
The Stockton Springs vigil comes one night after a candle light vigil was held in Belfast. Over 100 community members there gathered to mourn Kennedy.
This included embers of the waldo county sheriff's department, who emotionally connected with residents...
And also acknowledged that they wish more had been done to prevent the tragic killing.
Another vigil will be held Monday night at Bangor's Cascade Park.
There will also be a balloon release in Kennedy's honor before the vigil at the park.