Azelle Rodney's mother Susan Alexander has repeated her claim that her son " was executed" by a police firearms officer.
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Social deprivation and suffering from prolonged health problems were the main factors inflating emergency department attendance.
The hills are likely to see the most snow, with blizzard conditions at times too.
The victims, aged between 2 and 29, were found in a house in Perris, an hour’s drive south-east of Los Angeles.