Rose Bell misses her baby brother.
"It's just like a nightmare. It's like I look for him I can hear his voice, I will never forget," Bell said.
A year ago this month, someone shot and killed 53-year-old Robert Mack.
Police found his body in his friend's truck in Lake Worth.
Mack's family members are hoping their fliers generate tips so homicide detectives can find his killer.
"We would like to share that you took a brother, a dad, you took a friend, you took a loved one away from us and it hurts so bad," sister Carolyn Mack Sheard said.
The family believes someone knows something. They just need a little push to come forward.
"If anybody knows anything they can share with us or with the Sheriff's Department to bring this to a closure because we miss Robert so very much," Mack Sheard said.
"This will not be a cold case," said Bell. "We will keep going and walking and knocking on doors until we get some answers."