Sirens blared along Ramona Boulevard in Baldwin Park as police officers from throughout the region gathered Friday to mourn one of their own.

In remembrance of Officer Samuel Riveros, who was killed in a shootout last weekend, hundreds of residents and officers surrounded an expansive arrangement of blue and white flowers fashioned into the shape of hearts and crosses at the Baldwin Park Police Department. Family, friends and locals stood solemnly and at times silently wept as law enforcement officials spoke of Riveros’ work and presence in the community.

Riveros, 35, was a husband — he married a childhood friend — and father of two. He served for nearly 10 years as a member of Baldwin Park’s SWAT team and also worked as a training officer, according to Police Chief Robert Lopez. He was

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