The lawsuit also names North Memorial Health Care, where Schulenberg worked at the time; UnityPoint Health, which operates the Moline hospital; and Walgreens Co., which operates two drug stores where Prince got prescriptions filled. The earlier lawsuit named only UnityPoint and Walgreens.

North Memorial said in a statement that it also stands behind the care Prince received. UnityPoint spokeswoman Vickie Parry said they can’t comment on pending litigation. Walgreens did not immediately return a message seeking comment.

“The Minnesota lawsuit is against all parties whom we now believe share legal responsibility for Prince’s death, but it is possible that we will identify and add other parties as we move forward with the case,” Goetz said.