Beck said Leong, who identified himself to police as a homeless person from Cambridge, was originally from Tierrasanta, Calif.
--Staff writers Marc J. Ambinder, Edward B. Colby, David H. Gellis, David S. Stolzar and Joseph P. Flood contributed to the reporting of this story.
--Staff writer Garrett M Graff can be reached at ggraff@fas.harvard.edu. Staff writer Adam M. Lalley can be reached at lalley@fas.harvard.edu.