The 38- year old was found shot inside of his Lydia Street home, police said the only one who witnessed the murder was his four year old child.
The victim's family spoke out Monday morning stating they want justice.
"His sisters lost a brother, his mother lost a son, his children lost a father and I lost my boyfriend," said Kristy Guillimod, William's girlfriend. "He wouldn't do anything to hurt anyone."
Police believe the motive may have been a robbery, but few tips and leads have come in. Nearly two months later the Williams family and police are hoping to generate new information that will lead to an arrest.
"We want someone to come forward to help police find who took our brother away," said Terri Meek, victim's sister.
"People out there know they have information," said Chief Michael Burgan, Richland Police Department. "It could be the information we need in the case."
"There is still a cash reward that is being offered in the case," said Detective Kevin Gaudlip.
"This is so hard for all of us because we're baffled by it, its unreal," said Guillimod.