Why did Heritage Bank collapse?

AB&T 10 ADAMS B&TC 3 AUSTIN Bank TX National Association 13 Bank of Holland 6 BNA Bank 30 CITY National Association National Bank OF FL 12 Commonwealth Community Bank 13 Community First Bank 4 Elk State Bank 9 FIRST Community Bank OF TN 6 FIRST INTERNATIONAL B&TC 4 First National Bank of Allendale 1 First National Bank, Pana 13 Grand MO Bank 4 LifeStore Bank 5 Mountain Valley Bank, National Association 2 RIVER VALLEY Community Bank 4 Table Rock Community Bank 8 Washington County Bank 9 WOODFOREST National Association National Bank 12