A San Antonio Police Department officer needs help from the community.

Officer Roland Perez has helped keep San Antonio safe for 20 years, but now he’s fighting for his life. Perez is battling a type of bone marrow cancer and needs a bone marrow transplant.

The Perez family is inviting the community to a blood drive and marrow donor registration on Saturday from 11 a.m. to 5 p.m. at the South Texas Blood and Tissue Center.

The Perez family is also holding a fundraiser to help with medical costs.