Forest Park Medical Center Southlake has filed for Chapter 11 protection, making it the last of the chain's properties to file for bankruptcy or close. Forest Park Medical Center Southlake files for Chapter 11 bankruptcy. Forest Park Medical Center Southlake has filed for Chapter 11 protection.[/caption] The managers filed for bankruptcy on Jan. 19 and owe somewhere between $10 million and $50 million to at least 200 different creditors. Its largest unsecured creditor is to American Healthcare Investors, Inc., a subsidiary of the building’s owner, Griffin North American Health Care REIT. The hospital owes more than $11.7 million in unpaid rent. The bankruptcy comes just two months after a Missouri bank sued in federal court alleging that its managers defaulted on an equipment loan and owe $3.4 million to cover the balance. Earlier this month, Forest Park’s Fort Worth hospital filed for Chapter 11 bankruptcy. Its facilities in Dallas and San Antonio are closed, and one in Austin never opened. Frisco is also operating under its Chapter 11 filing.