Five victims -- all women -- were shot and killed inside the clothing store on February 2. Police have received more than 2,000 tips in the case but there's been no arrest.
Relatives of the victims had a message for the killer.
"This family's hurting out here. He just needs to turn himself in. He's man enough to commit the crime. He should be man enough to turn himself in," said Maurice Hamilton, victim's brother.
"It's just really hard for me to like to go on. I want to move forward but knowing all of this. It's hard. Day by day it gets a little bit easier," said Tony Chiuso, victim's husband.
A reward for information leading to an arrest and charges in the case was increased to $100,000.