Freddie Glenn abducted, raped and murdered Grammer's teenage sister Karen in 1975. She bled to death after Glenn and two associates slashed her throat and dumped her by the side of a road in Colorado Springs, Colorado after molesting her.
He was handed a life sentence for the crime but came up for parole earlier this year (09).
Grammer vowed to fight to keep Glenn behind bars and although he was not able to attend his parole hearing on Monday (27Jul09), he wrote a moving letter to the prison board, urging them not to let the killer walk free, according to TMZ.com.
His letter, which was read aloud at the hearing, paid tribute to his sister and revealed the family's heartache over the brutal murder.
It read, "She was so smart and good and decent. She was my best friend and the best person I knew.
"That day in 1975 she was looking forward to coming home; instead she was abducted by a group of animals, raped by them, savaged by them and then finally butchered by them.
"I loved my sister, Karen. I miss her. I miss her in my bones. I was her big brother. I have never gotten over it. lt very early destroyed me. I know it destroyed my grandmother. My mother was broken by it.
"Please consider when you wrestle with the fate of this man that killed my sister, (that) we, whose lives were so altered by his selfishness and brutality, have spent those years in a prison of our own - why should his fate be any different? More importantly how can you ever believe this man can be safely returned to society.
"Consider the extremity of his crimes. This is a butcher. A monster. Can you be certain he will not slaughter another innocent life and destroy another family?.
Grammer's wish was granted and Glenn was denied parole. He will not be eligible for release again until 2014.