Obama done talking about Trayvon Martin case: White House

— -- President Barack Obama will not be commenting further on the Trayvon Martin case, the White House said Wednesday as the Associated Press reported that charges were being filed against the teenager's killer, George Zimmerman.

"I certainly don't expect you'll hear from him about an ongoing investigation both at the state and federal level. The comments he made are all that you will hear from him on that specific case," Obama spokesman Jay Carney told reporters. "He and I and others will refrain from commenting on it."

Obama memorably waded into the national debate over the tragedy in late March. "If I had a son, he'd look like Trayvon," the president said.

Amid angry charges that race played a central role in the tragedy, Obama said "all of us have to do some soul searching to figure out how does something like this happen —and that means that we examine the laws and the context for what happened as well as the specifics of the incident."

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