Louis Lowenthal in 2010

Stoneleigh's Louis Lowenthal won two titles at the Free State Trophy Meet for the champion Sharks in July 2010. (November 1, 2012)

An autopsy on the body of Louis Lowenthal, the 14-year-old swimmer from Towson who died last October after being found unconscious in a pool at North Baltimore Aquatic Club, determined his death was accidental and caused by complications of partial drowning.

Louis, a freshman at Towson High School, was found at the bottom of the pool after training with his team at the club's Meadowbrook Aquatic Center on Sunday, Oct. 28, the autopsy said.

The report, completed by Associate Pathologist Erin Carney and Assistant Medical Examiner Russell Alexander, said Louis was in cardiac arrest when he was pulled from the pool.

The autopsy said he was resuscitated and taken to Sinai Hospital, where he was found to have anoxic brain injury — which is caused by prolonged lack of oxygen to the brain.

Louis was pronounced dead three days later, on Wednesday, Oct. 31.

Louis' mother, Chloe Thio, and Frank Morgan, an attorney who represents NBAC, both declined comment on the autopsy results.

The young man's death shook the Stoneleigh community in Towson, with information on his condition scarce in the days after he was rushed to Sinai Hospital as paramedics performed advanced life support measures.

John Cadigan, director of operations for NBAC, wrote in an email to members that night that Louis was in a coma.

The Stoneleigh resident was remembered at a celebration of life ceremony at Goucher College a week after his death, where friends, coaches, and family members shared tears and warm stories about his eccentricities and his exceptional personal and academic accomplishments.

At the celebration, friend and classmate Vaughn Parts read an essay Louis wrote earlier in 2012 about the meaning of swimming in his life. The essay won first place in a Baltimore County middle school writing contest earlier that year.