These errors include failure to maintain proficiency and care of weapons and equipment, improper searches and handcuff use, getting sleepy or actually falling asleep, relaxing too soon, missing danger signs, taking a bad position, failure to watch the suspect's hands, preoccupation, and apathy. Other errors include complacency, abandoning or not using cover, improper attitudes, lack of communication, and tunnel vision. A member of the San Diego Police Department discusses these errors, the goal being to help other police departments minimize police officer deaths and encourage police safety precautions. He notes the importance of identifying police roles, communication between partners, and teamwork.