Karen Slowing-Aceituno (born 22 December 1968) is a Guatemalan former swimmer who competed in the 1984 Summer Olympics. She competed in the 100 metres, 400 m and 800 m freestyle events.
She is the cousin of Melanie Slowing.
Her daughter Valerie Gruest was an Olympic swimmer in 2016 at 400 and 800 m freestyle.Northwestern commit Valerie Gruest Slowing.., Swimswam.com, Retrieved 8 August 2016
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