A Cook County jury has awarded $4.7 million to the estate of a man who died in a rear-end interstate collision.The estate of Walter Blockmon III sued Cutco Corp., its wholly owned subsidiary Vector Marketing Corp. and its sales representative Jakobi McClellan in 2014, alleging the companies failed to properly train its representatives on using cellular devices while driving.McClellan, who was 18 at the time, was traveling between sales calls on eastbound Interstate 80 near Pulaski Road in Country Club Hills in his 1997 …