Massey was shot and killed inside her Springfield home by former Sangamon County deputy Sean Grayson, who responded to her home after Massey called 911 to report an intruder. Grayson was fired from the department and has pleaded not guilty to first-degree murder charges.
"Sonya loved her kids. She loved them," said Raymond Massey, the victim's uncle.
Civil rights leaders joined Massey's family at New Mount Pilgrim Missionary Baptist Church in West Garfield Park, beginning the rally around 6 p.m.
"My mother was everything to me," said her son Malachi Hill Massey. "I love her with my whole heart. It's just overwhelming."
READ MORE: Bodycam video reveals chaotic fatal police shooting of Black woman in Springfield
Various relatives were joined by national civil rights attorney Ben Crump, the Rev. Al Sharpton and Rev. Jesse Jackson for a news conference.
"She needed a helping hand. She did not need a bullet to the face," Crump said.
Grayson, 30, has pleaded not guilty to first degree murder and official misconduct charges for shooting and killing the 36-year-old on July 6. Records show Grayson worked for six law enforcement agencies in the past four years. Today there were calls for an Illinois law requiring more transparency when officers move from department to department.
"We need an Illinois law made out in her name. We need to name it after her, that you cannot be switching precincts," Sharpton said.
A spokesperson for Go. JB Pritzke had no direct comment on such a law, but said he "committed to a partnership with the Massey family to further efforts for racial justice in Illinois."
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There were also more calls for Sangamon County Sheriff Jack Campbell to resign. Monday night, at a public meeting in Springfield, he admitted his department failed but resisted calls to step aside.
"I stand here today before you with arms wide open and I ask for your forgiveness," an emotional Campbell told a hostile crowd of more than 500 people. "I ask Ms. Massey and her family for forgiveness. I offer up no excuses. What I do is offer our attempt to do better, to be better."
Massey's family has repeatedly called for the resignation of Campbell, who was elected in 2018 and ran unopposed in 2022. The sentiment was echoed by many attending the meeting.
"I will not abandon the sheriff's office at this most critical moment," Campbell said. "That would solve nothing."
ABC7 reached out to Grayson's attorney, who declined to comment.
The Associated Press contributed to this report.