SAN JUAN, Puerto Rico—Puerto Rican boxer Félix Verdejo turned himself in to federal agents Sunday night just hours to face federal charges after authorities identified the body of a dead woman as his 27-year-old pregnant lover, officials said. The U.S. Attorney’s Office said late Sunday that Verdejo was being charged with kidnapping and carjacking resulting in death and with intentionally killing an unborn child. A criminal complaint filed by the FBI accuses Verdejo of punching Keishla Rodríguez in the face and injecting her with a syringe filled with an unidentified substance bought at a public housing complex. It alleges he then bound her arms and feet with wire and tied a heavy block to her before throwing her off a bridge at 8:30 a.m. Thursday. The complaint states that Verdejo then shot at Rodríguez’s body as he stood on the bridge. The complaint says a witness it did not identify …