(NBC News) A week after a Navy SEAL trainee died following a swimming drill in California, accounts are emerging that challenge the Navy’s narrative of what happened and paint a darker picture, alleging that the death may have been the result of an instructor going too far.

Seaman James Derek Lovelace, 21, died May 6 during what a Navy spokesman described as a swimming exercise in the first week of SEAL training. A safety observer noticed Lovelace “having a hard time,” the spokesman said, and instructors guided him to the edge of the pool and tried to revive him. He never regained consciousness.

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