"She loved her kids, she would do anything that she could to make sure her kids had what they needed," Horton's brother Derrick Shaw said.
The community saw a glimpse of that strength last year when her youngest daughter was paralyzed in a gang-related shooting.
Her mission for justice is one that left an impression on homicide detectives like Sgt. Michael Wenger.
"That's one of our struggles, is getting people to cooperate and she was strong enough and cared about her child enough that she felt like that's what she needed to do and she was moving forward with it," Wenger added.
Horton was set to testify in September against the man accused of shooting her daughter.
Police say Horton's death was gang-related but it's not clear if her plans to testify played a role.
Wenger says investigators are following several leads in the case but still don't know who pulled the trigger.
Despite the violence that's struck the Horton family, Shaw said they forgive who is responsible.
"The Bible says we must forgive. So we forgive whoever did that to my sister. We have no hard feelings," he added.
Horton's family is now focused on the four young children she leaves behind and how they will explain what happened to their mother.
"As a family, we haven't been talking much about her because we're trying to keep their minds off of it, but eventually we're going to sit down and talk to them and put it to them in the Christian way about their mother," he said.
The community continues to rally behind the Horton family, raising more than $5,000 on a GoFundMe page since her death and prompting change around how the city protects witnesses.
"I'm proud, my sister's death is tragic to some, but to us, it's a good thing because her death has made a major influence on the city and the community," Shaw said.
If you have any information that can help Chattanooga Police find who killed Bianca Horton, call 423-698-2525.