Real estate agent abducted, robbed and shot to death. The suspect: A 15-year-old boy.

Forensic investigators learned that his cellphone also linked him to the killing, showing that he had been in the area where Barbosa was abducted, in the 600 block of NW 15th Terrace, a mile south of the teen’s home, detectives said. The cellphone’s internet search history showed that on Feb. 2, a day after the crime, he had accessed a news story about the real estate agent’s death.