Glen James holds a special citation while facing reporters with Boston Police Commissioner Edward Davis during a news conference at police headquarters on Sept. 16. Steven Senne/AP hide caption

itoggle caption Steven Senne/AP

A Boston police officer wheels an injured boy down Boylston Street as medical workers carry an injured runner after the Boston Marathon bombing in April. Charles Krupa/AP hide caption

itoggle caption Charles Krupa/AP

Molly, a purified form of Ecstasy, is said to be popular at dance clubs and electronic music festivals. Alen Popov /iStockphoto.com hide caption

itoggle caption Alen Popov /iStockphoto.com