I think it is more often, if I'm reading the question right
Kathy O'Brien (the defense attorney) In Steve's screenplay, Kathy is "the defense attorney with doubts" (2.16). She's "all business as she talks to Steve" (2.32), and sees no need to believe her clients, or even to believe in them—her job is only to prove their innocence to a jury.
Answer: They think that Grendel's mother killed beowulf because he has been underwater for such a long time.
Explanation: