Boston police have made an arrest in the killing of 18-year-old Blanca Lainez, who was found beaten and stabbed to death in June in East Boston.

Construction workers found Lainez’ body on a pile of 2x4 boards in a garage behind 54 Princeton St. on the morning of June 15, according to the Suffolk Country District Attorney's office. She was pronounced dead at the scene.

RELATED: Woman's body found in East Boston garage

On Sunday, authorities arrested East Boston resident Jose Hernandez, 16, and charged him with murder. 

Authorities used a combination of phone records, surveillance images and forensic evidence in the case. According to prosecutors, "analysis of Lainez’ cellphone showed 'extensive contact' between Hernandez and the victim prior to her homicide and suggested 'animosity' between the two. Hernandez had threatened her in the weeks prior to her death."

RELATED: Police identify woman found dead in East Boston garage

"This arrest reflects a nonstop investigation into a crime of brutal violence," Suffolk County District Attorney Daniel Conley said to Boston.com. "But that investigation is still very active, and we urge anyone with additional information to share it with police and prosecutors.”