Calvin Harper Jr. was laid to rest Wednesday, but loved ones say they haven't found peace yet.
Queen Amison, Harper's mother, said she is confident police will find her son's murderer.
"I know Calvin wouldn't want it any other way," she said. "He can't rest until I find out who did this to him. It might take a little while, but it's going to happen."
Harper, 29, was found shot to death March 12 in his house on Parkview Boulevard.
Sandusky acting police Chief Charlie Sams said the department isinvestigating leads.
"We're working on it. It just takes time if you want it done right," he said.
Detective John Orzech said Friday the department hassuspects "in mind" it is actively pursuing.
Harper left behind family and friends, including four siblings and six children.
His ex-wife, Andrea Hereford, 28, said explaining the circumstances to their 3-year-old daughter, Imaya, has been the hardest.
"Once she saw the casket, (she said,) 'I just want him to wake up.' I said, 'He's lying there, but his spirit is moving on,'" she said.
Hereford said after more than a week, Harper's death is just now becoming a reality.
"It's just setting in that he's gone. The person or persons responsible for taking him away from us are still out there. I wish there was more I could do to help," she said.
Hereford said she knows finding Harper's murderer won't bring him back, but it will help give closure to his family and friends.
"I believe in my heart that they will eventually find the person. When or how long they will take, I don't know," she said. "I hope and pray every night they get justice on this Earth."