A 10-year-old girl who was killed in a suspected hit and run in September was a volunteer with Northumbria Police.
Her funeral was held on Friday in the city, with hundreds of people attending the service at West Road Crematorium.
She added: "As a member of our extended police family, we will continue to help both her family and the school in any way we can.
"We hope that we can continue the excellent community work started by the Mini Police in her memory."
Across the Northumbria force area there are 37 schools signed up to the Mini Police scheme.
Melissa's mother Kim and her father Michael spoke of their pride at Melissa joining the Mini Police.
Kim said: "Melissa was so excited to be part of the Mini Police and I was so proud that I saw her in her uniform.
"She was a really kind girl who just wanted to help people so it didn't surprise me she wanted to be part of it.
"The fact that she wanted to help the police keep her friends and family safe does make me smile but it was just the kind of person she was.
A 23-year-old man has been charged with causing death by dangerous driving. He appeared in court last month and will appear at Newcastle Crown Court at a later date.