In this heartbreaking photo you can see Boston Bombing victim Martin Richards, 8-years-old, circled in blue and suspect #2, Dzhokhar Tsarnaev,19-years-old, in the background along with the suspected bombing device both circled in red.

Source: http://www.nydailynews.com/news/national/new-photo-boy-bomb-victim-suspected-killer-article-1.1321595