BOSTON (WHDH) - Boston Police have arrested 16-year-old Jose Hernandez for the murder of 19-year-old Blanca Lainez, who was found beaten to death in an East Boston garage in June.

Hernandez was arrested on Sunday morning.

Blanca Lainez was found inside of a garage of a home under construction on Prince Street in East Boston. She suffered from undetermined traumatic injuries and was pronounced dead at the scene.

According to friends, Lainez lived in Chelsea but was originally from El Salvador.

Hernandez appeared in court Monday morning.

Surveillance video captured Hernandez in the area of the crime at the time.

He was apparently seen running away and putting something in his pocket.

On June 30, Hernandez was arrested for having a knife and his fingerprints were taken. Those fingerprints match the ones found at the scene of the crime.

He is being held without bail.

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