Tear Asunder

In the beginning when the detectives confront the bloodied husband, the suspect then attacks Detective Crews and they fall into the pool. His partner takes the taser from a uniformed officer, inserts the prongs into the pool and "zaps" the pool effectively tasing the suspect and her partner. The problem is that both were under water. Electrical currents don't run through water, only over the surface. So nobody would have been tased and the fight would have continued until they tired or drowned.