(AP) — Ferguson's cost of implementing reforms spelled out in a consent agreement with the U.S. Department of Justice could approach $4 million in the first year alone, according to new estimates that further raise questions about whether the community can afford it. Wilson, who later resigned, was not charged but the killing sparked unrest, deepened scrutiny about police use of force and law enforcement's interactions with minorities, and led to a Justice Department investigation of Ferguson. After seven months of negotiations, a consent agreement was announced last month that envisions a top-to-bottom reshaping of basic practices such as how to conduct traffic stops and when to use force. [...] estimates about how much it will cost were mostly guesswork, ranging from $500,000 to $1.5 million for the first year. Ferguson already has a $2.8 million deficit due largely to fallout from the shooting — overtime costs for police during protests, lost sales tax revenue from businesses damaged in fires and looting, legal costs, lost income from municipal court reforms already in place. The consent agreement calls for Ferguson to pay the cost of a Justice Department monitor for at least three years; increase diversity training for officers; and purchase software and hire new staff to maintain statistical analysis of police data on arrests, traffic stops, use of force and other police actions.