PHILADELPHIA (CBS) – Police say they’ve made an arrest in the weekend murder of a teen in the Fairmount section of Philadelphia.

Twenty-three-year-old Sergio Santiago was reportedly taken into police custody on Wednesday, April 2 – just three days after the body of 17-year-old Antonio Flores was found inside an apartment on the 1600 block of Wallace Street (see previous story).

Flores died of a gunshot wound to the head.

Police say Santiago was arrested at the Neshaminy Inn on Wednesday this morning.

The investigation into the circumstances of the shooting continues.

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