When Kathy joined the Delaware Department of Justice she was one of the first women to work in the Criminal Division. Over her career, Kathy prosecuted hundreds of cases, including domestic violence, sexual assaults, child exploitation and murder. Most notably, she worked with the FBI, New Castle County Police Department and Delaware State Police in a year-long investigation to identify and arrest a serial killer who tortured and murdered five women. Kathy successfully prosecuted Steven Pennell for these crimes. Not only did Kathy secure the conviction but this case was the first time that DNA analysis was admitted into evidence in a Delaware Court.
During her tenure as Chief Deputy Attorney General, Kathy oversaw the operation of the Office, including the Special Investigations Unit, which was primarily responsible for the investigation and prosecution of white collar crimes, police involved shootings and violations of public trust. While in this role Kathy spearheaded legislation that created the Consumer Fraud Division.
In November 2011, Attorney General Beau Biden asked Kathy to serve as his State Prosecutor. As State Prosecutor, she supervised over 100 prosecutors statewide. Kathy worked on numerous policy and legislative initiatives related to criminal justice, including reforming habitual offender laws, protecting the voting rights of individuals exiting the criminal justice system, strengthening gun laws involving violent felons and seeking reform of the bail system. Under the leadership of Attorney General Beau Biden, Kathy formed the Crime Strategies Unit, whose focus was to work directly with residents in areas with high incidences of violent crime. Kathy also worked with police to formulate Delaware’s first model policy for police worn body cameras, and worked with police and the American Civil Liberties Union to institute a statewide protocol for eyewitness identifications. While State Prosecutor, Kathy successfully secured funds to provide the lifesaving drug, Narcan to police agencies statewide.