Published 3 hours ago • Updated 3 hours ago NBC 7 A man was killed in multi-vehicle crash Sunday after experiencing a medical emergency on the Eisenhower Expressway on the West Side. Byron McClain was westbound about 1:35 p.m. on Interstate 290 when he suffered an “unknown medical emergency” that caused him to veer out of his lane and crash into a concrete barrier, Illinois State Police said. Don't miss local breaking news and weather! Download our mobile app for iOS or Android — and sign up for alerts. McClain, 47, then veered into oncoming traffic and struck two vehicles, state police said. Local