Police Chief James Craig says Detroit's emergency dispatch system still isn't fully operational after crashing last week.
Fire, police and emergency medical services were not able to use the system for about two hours on July 5.
Some officers used cell phones to contact dispatchers. Calls for service were routed through state police dispatchers. Residents in non-emergencies were told to go to a police station and file a complaint.
Craig said Friday that one of 10 communications towers still wasn't working after overheating. The towers are owned by Motorola. Detroit pays $1.4 million annually for maintenance on the system.
Craig says his office holds Motorola "accountable" for the hardware failure and some responsibility falls on the city.