Blamably; in a manner to merit censure; reprehensibly.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
ad. in a manner or to a degree deserving blame or censure
Word Usage
""Either they were culpably unaware of the mounting dangers, or, if they were aware of them, they equally culpably failed to alert the supervisory authority of their concerns," the report said."