"I won't ever stop as long as I live, I won't ever stop," said Lena Plummer.
68-year-old Lena Plummer is a mom on a mission to find the person who murdered her son.
"'I love you, Mom.' They were the last words he said to me," she said.
Solomon Plummer, known as "Big Daddy" was the father of five, a former Marine and the recipient of a Liberty Bell Award for heroism after he broke up a robbery in the summer of 2007.
He opened his own bar in the 3200 block of West York Street in Strawberry Mansion.
On October 3, 2007, he was found dead inside the studio next to the bar. He was shot once in the back of the head. There were no signs of forced entry or robbery.
"I know somebody knows something, because knowing my son, a Marine, you just can't get behind him and shoot him one time in the head. So it had to be somebody he knew and trusted," said Plummer.
The Citizens Crime Commission is offering a $1,500 reward, and the city of Philadelphia is offering up to $20,000 for information leading to an arrest and conviction.
Anyone with information that could help solve this case can call the Citizens Crime Commission at 215-546-TIPS or the Philadelphia Police Tipline at 215-686-TIPS. Your call will remain anonymous.
"This case hurt me so bad," said Plummer. "I need to know who would hurt my baby like that."