Hillsborough families vow to challenge Bettison decision
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![Hillsborough families vow to challenge Bettison decision](http://e3.365dm.com/17/08/70x70/77ccbea899d1b9a63693b92ab7af056d121313b777b960f1073b3fba2e805348_4069742.jpg?20170809182026)
Families of victims of the Hillsborough disaster have vowed to challenge a decision to drop charges against a former police chief.