The New York Times reported that the Navy ordered an investigation after a sailor's death revealed widespread drug use, physical abuse, and medical neglect.

The Basic Underwater Demolition/SEALs, or BUD/S, course, which is known for extreme training methods including exercises underwater with bound hands, was the cause of Kyle's death.

The New York Times reported that after the "Hell Week" that included over 200 miles of frigid swims and running in hot sand, Mullen had been coughing up blood.

According to The New York Times, the sailor's official cause of death was ruled to be bacterial pneumonia, but his family believes medical neglect played a role in his death, as medics saw the condition he was in but did nothing to treat him.

The New York Times quoted his mother as saying that he was killed. It's torture but they say it's training. The proper medical care was not given to them. The prisoners of war are treated better than the guys.

The man who survived Hell Week had to be intubated after Mullen's death. Two more people were taken to the hospital that night.

Sailors use illegal drugs to push through the BUD/S course. The New York Times reported that the Navy launched a preliminary investigation after finding steroids and performance enhancing drugs in Mullen's car.

A day after The New York Times published its initial report on Mullen's death and the abuses it revealed, the outgoing vice chief of naval operations, Adm. William K. Lescher, issued an order to a rear admiral from outside the navy to investigate.

Lescher's letter ordered a review of the course's safety measures, the qualifications of instructors and medics and its drug policies for students, The New York Times reported.

The US Navy didn't reply immediately.