MILWAUKEE -

Milwaukee police says an internal investigation is underway into why it took nearly 22 minutes for officers to respond to a stabbing that resulted in a woman's death.

Lt. Mark Stanmeyer says a preliminary investigation indicates the dispatch call was not handled within protocol. Stanmeyer says Chief Edward Flynn has addressed the situation with his command staff and by issuing a department-wide directive.

Barbara Killebrew was stabbed in a north side residence Tuesday. Dispatch records show a 911 call about the stabbing was placed at 5:28 p.m. and it was 5:48 p.m. before an officer reached the scene. The Journal Sentinel reported fire department personnel responded within three minutes, but as a matter of procedure, waited to treat Killibrew until police arrived to secure the scene. She was pronounced dead at 5:54 p.m.