Two-year-old Keanu Williams, who was beaten to death by his mother, had 37 separate injuries, including extensive bruising to his head, stomach, back and legs, when he died.
The toddler also had a fractured skull and a fist-sized tear on his stomach when he was found dead in January 2011.
The detective in charge of the investigation said it was the "worst" child abuse case she had ever seen.
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The arrests were made on suspicion of producing and disseminating pedophilia content on the internet, the country's Justice Ministry said.
The A4-sized sketch originally went for £75 when it was first sold.
Ex-White House adviser Steve Bannon has described George W Bush as bumbling and inept, criticising his "destructive" presidency.