President Barack Obama said Friday that "every aspect" of the death of Trayvon Martin, the black teenager shot in Florida last month, must be investigated.

"My main message is to the parents of Trayvon Martin: If I had a son, he'd look like Trayvon," Obama said. "I think they are right to expect that all of us as Americans are going to take this with the seriousness it deserves, and we're going to get to the bottom of what happened."