died December 19 at Maine Medical Center, Biddeford, ME.
McKenna was born in Princeton, NJ on January 4, 1991, the firstborn of Richard and Patricia Mahoney Dempsey. He attended Kennebunk schools and was a senior at Cheverus High School.
McKenna enjoyed his years at Cheverus, excelling in academics and playing lacrosse and basketball. He worked summers at Bennett’s store in Kennebunk and later at Stripers restaurant saving his money for college. He poured his heart into every thing he did.
McKenna is survived by his parents, Patty and Rick; his three sisters, Mary, Martha, and Maureen; his grandfather, Donald Dempsey; his aunts and uncles, Meg Dempsey, Peter Dempsey, Michael Dempsey, Susan Dempsey Rouillard, Jeremiah Mahoney, Sharon Mahoney Hickson, Mark Mahoney, and Brian Mahoney; and twenty two cousins.
A funeral mass was celebrated at Holy Spirit Parish, in Kennebunk December 23.
Memorial donations may be made to:The McKenna James Dempsey Cheverus Scholarship Fund, Cheverus High School, 267 Ocean Avenue, Portland, ME 04103 www.bibberfuneral.com

