It happened on August 15th, 2009.
A Spokane 22-year-old was out enjoying a final night of summer freedom before starting automotive school. He never could have known, it would end up being the final night of his life.
"It was a Sunday morning," said Bill Floyd. "My wife and I were upstairs sleeping. I heard banging on the door. They wouldn't go away."
Bill Floyd then looked out his window. A wave of overwhelming dread came over him as he answered his front door.
"As soon as I opened it up, I saw the chaplain. I just knew. I yelled to my wife, she better come down because something terrible had happened."
He knew it was his boy, Billy.
His daughter Stephanie, Billy's sister, can't get thoughts of what his final, agonizing moments must have been like.
"I picture him lying there dying, wanting to say goodbye, wanting to be with his family," she said.
But Billy's killer made sure that wouldn't happen. Records show Billy and a friend were walking in a parking lot near lot near Indiana and Lincoln that early August morning. Reports state that friend told police they saw another man, a stranger, and for no apparent reason that stranger attacked. Billy was stabbed multiple times. He said the attacker ran off.
Billy's dad suspects that version might not be accurate.
"There's more to the story, it was not a stranger in my opinion," he said. "Everything I've found has pointed to something different."
Billy's family says they have relentlessly pursued answers for years now. They say they were left heartbroken after they claim the original detective didn't offer much hope.
"She (the detective) told me from the get go, this won't be solved," he said. "The very first words out of her mouth were this won't be solved.
And here we are, almost 10 years later, with no justice. They can't help but fear she could be right.
"My family has been destroyed," he said. "We still suffer today."
And things only get worse around the holidays.
"This time of year, I have such a hard time, I get in trouble at work, because I can't hold it in," he said.
That's why Billy's family is talking to KHQ's Hayley Guenthner. They don't want to hold it in anymore. They want whoever did this caught, and have this to say to anyone who can help make that happen.
"Put yourself in my shoes," Bill said. "What if it was your child buried in the ground, rotting, wearing my Seahawks shirt…would you want someone to come forward?"
If you can help in Billy Floyd's homicide investigation, please reach out to the Spokane Police Department.