(JTA) — More than 200 people participated in a community walk to bring attention to the unsolved murder of a Jewish mother of four.

The marchers gathered in the Cleveland, Ohio suburb of Beachwood on Sunday, Mother’s Day, and marched with balloons past the home that slain nurse Aliza Sherman had lived in, then marched to a Cleveland Clinic suburban building where Sherman had worked as a fertility nurse. There the marchers released red balloons in her memory. Clipped to each balloon was a card with the phone numbers of the Cleveland Police Department and Cleveland Mayor Frank Jackson.

Sherman was stabbed to death March 24 minutes after completing a meeting with her divorce lawyer at Erieview Tower in Cleveland. She was stabbed 11 times while in the tower’s parking garage. Police have yet to arrest a suspect.

Event organizers encouraged participants to call the Cleveland police in order to keep the case alive.

“We’ve been following up on all the tips and leads that have come in,” Sgt. Sammy Morris of the Cleveland Police Department told JTA earlier this month.