Mumia Abu-Jamal once faced a death sentence for the murder of a Philadelphia police officer, and on Sunday he encouraged the graduating class of Goddard College to make the world better.
The choice was a controversial one, and Pennsylvania Republicans said they would work on a bill to limit convicted killers' public speech.
Police and corrections officers in Pennsylvania and Vermont also spoke out against the speech.
Claudia Koerner is a national reporter for BuzzFeed News and is based in Los Angeles.
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