By Shirin Rajaee

COLUSA (CBS13) — A teen killer who was sentenced to life in prison without the possibility of parole could have that sentence reduced.

It’s been 21 years since Erik Ingebretsen was beaten and stabbed to death by his two best friends. The then-16-year-old’s murder left Colusa shaken. Now the town is coming together in a fight for justice.

READ MORE: 'I Don't Think That's Fair': Allora Co-Owner Says Staff Was Bumped Down Vaccine List

Nathan Ramazzini, who was widely believed to be the driving force behind the killing, was sentenced to life in prison but will face a resentencing hearing on Tuesday.

ALSO: Police Arrest Husband In Murder Of Candice De Anda

It was July 15, 1997, when Ingebretsen, a Colusa High School student, was brutally beaten to death by two kids his age he called his best friends.

READ MORE: 'My Nephew Died A Hero': Family Honors Man From Sacramento Mistakenly Shot And Killed By Idaho Police

“They took him to the Sacramento River where he proceeded to beat him with a baseball bat, stab him repeatedly,” said his cousin Emily Collins.

Ramazzini dumped Ingebretsen’s body in a Colusa County field and was later convicted of first-degree murder and was given a sentence of life in prison without the possibility of parole.

Ramazzini is now 38 and parole is a possibility because of Senate Bill 9, which was passed in 2013. It gives a second chance to those who were under the age of 18 at the time of their crime and sentenced to life without parole.

MORE NEWS: 3-Car Crash Forces I-80 Lane Closures, CHP Says

Hundreds are expected to gather on Tuesday morning to oppose the new sentencing. Ramazzini’s co-defendant has since been released on parole after a plea deal with prosecutors.