This July 2012 photo shows Reuven Rahamim, owner of Accent Signage in Minneapolis, with a machine he invented for putting Braille lettering on signage, in Minneapolis. Rahamim, 61, was shot to death at Accent Signage Systems Inc., in Bryn Mawr, a mainly residential neighborhood on the northwest side of Minneapolis, after a man burst into the sign-making business, fatally shooting Rahamim and three others in the office before turning the gun on himself, family and officials said Friday, Sept. 28, 2012. (AP Photo/Finance & Commerce, Bill Klotz) MANDATORY CREDIT

Associated Press
This July 2012 photo shows Reuven Rahamim, owner of Accent Signage in Minneapolis, with a machine he invented for putting Braille lettering on signage, in Minneapolis. Rahamim, 61, was shot to death at Accent Signage Systems Inc., in Bryn Mawr, a mainly residential neighborhood on the northwest side of Minneapolis, after a man burst into the sign-making business, fatally shooting Rahamim and three others in the office before turning the gun on himself, family and officials said Friday, Sept. 28, 2012. (AP Photo/Finance & Commerce, Bill Klotz) MANDATORY CREDIT
This July 2012 photo shows Reuven Rahamim, owner of Accent Signage in Minneapolis, with a machine he invented for putting Braille lettering on signage, in Minneapolis. Rahamim, 61, was shot to death at Accent Signage Systems Inc., in Bryn Mawr, a mainly residential neighborhood on the northwest side of Minneapolis, after a man burst into the sign-making business, fatally shooting Rahamim and three others in the office before turning the gun on himself, family and officials said Friday, Sept. 28, 2012. (AP Photo/Finance & Commerce, Bill Klotz) MANDATORY CREDIT
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