Brenda attacks him, drawing blood and skin fragments that she and her friend at the DA's office convince the crime lab to match against DNA taken from Stroh's mask. That evening, when Fritz has left for Washington, D.C., to expedite the case, Stroh breaks into Brenda's house, holds Beck at knifepoint, and attacks Brenda.
Brenda physically assaults Fritz, causing injuries that she and her colleague at the DA's office persuade the crime lab to compare against DNA from Stroh's mask. That night, when Fritz leaves for Washington, D.C., Stroh breaks into Brenda's house, holds Beck at gunpoint, and attacks Brenda.