Beth McCann

District Attorney

Second Judical District

201 W, Colfax Ave, Dept. 801
Denver, CO 80202


News Release

July 2, 2024 Contact: Matt Jablow, 720-913-9025

Kevin Bui Sentenced to 60 Years in Prison for Green Valley Ranch Murders

DENVER — Denver District Attorney Beth McCann today announced that Judge Karen Brody has sentenced Kevin Bui to 60 years in prison. Bui pleaded guilty on May 17 to two counts of second-degree murder.

On August 5, 2020, Bui and two other young men — Gavin Seymour and Dillon Siebert — set fire to a house in Green Valley Ranch.  Five people inside the house died in the fire, including a young mother and her infant daughter, as well as a young couple and their one year-old daughter.

Seymour and Siebert were sentenced previously — Seymour in March of this year to 40 years in prison, Siebert in February of 2023 to seven years in the Youthful Offender System and three years in the Division of Youth Services — after pleading guilty to murder charges.

“As the ringleader of this deeply disturbing and utterly senseless crime, Kevin Bui deserved exactly what he received today: the longest sentence of the three defendants in the case.  Were it not for his actions, five completely innocent victims would still be alive today.  It is my hope that his sentence will bring some measure of comfort and a sense of justice to the victims’ families and friends. I want to thank the prosecutors, investigators, victim advocates and legal secretaries in my office, as well as the detectives with the Denver Police Department and the members of the Denver Fire Department and the ATF, whose outstanding work on the case resulted in a successful outcome,” said DA McCann.

About the Denver DA’s Office:

Our mission is to professionally and competently prosecute crimes and investigate criminal activity on behalf of the people of Colorado, and to seek equal justice for all in the criminal justice system. Our mission also includes preventing crime, supporting the well-being of victims, being involved in the community, being transparent and accountable, and improving the criminal justice system to provide fair alternatives to incarceration in appropriate cases.