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By Richard Valdmanis BOSTON (Reuters) - The older brother of convicted Boston Marathon bomber Dzhokhar Tsarnaev was transformed from a heavy drinker and drugs user into someone obsessed with Islam after returning from a trip to Russia in 2012, witnesses said on Tuesday. The 21-year-old ethnic Chechen was convicted this month of killing three people and injuring 264 in the bombing, and shooting dead a police officer three days later alongside the older brother, Tamerlan. Rogerio Franca, who lived near the Tsarnaev family in Cambridge, Massachusetts, told jurors Tamerlan was a partier before his trip to Russia but transformed into someone more closely resembling a devout Muslim when he returned. "Most of the time he was drunk, most of the time he was high," Franca said of Tamerlan before his trip.
A riot in Baltimore, US, sparked by the death of a black man in police custody, is the latest outpouring of anger at perceived police racism. Rioting erupted Monday after the funeral of Freddie Gray, a 25-year-old Baltimore man who died of severe spinal injuries eight days after he was detained by city police. FERGUSON, Missouri: On August 9, a white police officer kills an unarmed black teenager, aspiring college student Michael Brown, 18, unleashing sometimes violent protests and heavy-handed police tactics. A later decision not to indict police officer Darren Wilson prompts riots in Ferguson and raises tensions from New York to Seattle with thousands taking to the streets.