Is it true Selena quintanilla mom donate blood when she was dying due to her religion?

Selena Quintanilla-Pérez's mother, Marcella Ofelia Quintanilla, did not donate blood when Selena was dying due to her religion. Marcella Ofelia Quintanilla is a Jehovah's Witness, and Jehovah's Witnesses believe that blood transfusions are against God's law.