A Chicago man was charged with theft after allegedly trying to sell undercover police officers a $2,700 sweater looted from an upscale boutique when caravans of people ransacked high-end stores in the city’s commercial districts over a week ago. Melvin Banks, 29, allegedly posted an ad for the sweater on the mobile marketplace OfferUp. An employee at the Brunello Cucinelli boutique on Rush Street, near Chicago’s Gold Coast district, noticed the sweater online and alerted the Chicago Police Department, Assistant State’s Attorney James Murphy said. It was priced at $2,700 and was stolen by looters who broke in on Aug....