By CBSNewYork Team

NEW YORK (CBSNewYork) — A memorial mass was held Monday for two NYPD detectives who were shot and killed seven years ago.

Fellow officers gathered at Our Lady of Guadalupe Roman Catholic Church in Brooklyn.

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They were there to honor Rafael Ramos and Wenjian Liu, who were assassinated as they sat in a patrol car in Bedford-Stuyvesant in 2014.

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Investigators said the shooter was motivated by a hatred for police.

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The president of the detectives union said the pain never goes away.

CBSNewYork Team