I don't know how Missouri law works, but in Texas they have a statute called "respondeat superior" which basically says the employer is responsible for the actions of the employee when the employee is acting under their employment. Which means, ultimately TLC would be responsible for the acts or omissions of its employee (in this case, the nurse). You can sue Ms. Dorothy all you want, but what you get, if you prevail, is a piece of paper called a "Judgment". Following that is the hardest part, you have to be able to "collect" on the Judgment. Unfortunately, if the individual has no assets or money, that Judgment is not worth any more than the paper it is printed on.