The city of Dallas is making more changes to its 911 call center after Chief David Brown disciplined two employees and opened an internal affairs investigation for supervisors.
All of that comes in the wake of Deanna Cook's murder.
Police said she was on the phone with 911 as her estranged husband, Delvecchio Patrick, attacked her and then ultimately killed her.
The chief said some procedures were not followed.
Dallas Assistant City Manager A.C. Gonzalez said the city is now working on fixing some staffing, technology, schedule, management structure and other issues within the 911 call center.
Records show a lot of overtime staffing at the center.
"We saw that was becoming an issue so we are making some adjustments in that area," Gonzales admitted.
The city is already moving police officers who are on light or limited duty to the 911 call center to make sure civilian workers aren't fatigued by overtime until vacancies created by attrition can be filled.
The center also came under scrutiny earlier this year when an Oak Cliff home went up in flames as the family watched. Several neighbors and family members said they tried desperately to reach a 911 operator, only to hear a recording.
KDFW FOX 4
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