A nurse was killed trying to protect patients , hospital system CEO says . One survivor remains in critical condition . Score: 7 The attack happened at Good Shepherd Ambulatory Surgical Center in Longview , Texas .
A nurse was killed trying to protect patients , hospital system CEO says . One survivor remains in critical condition . Police say they have a suspect in custody , but do n't have a motive . The attack happened at Good Shepherd Ambulatory Surgical Center in Longview , Texas .