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Tracy Wilkison, Deputy United States Attorney

Tracy Wilkison joined the United States Attorney’s Office in 1999. Prior to her appointment as DUSA, she was the Chief of the Cyber and Intellectual Property Crimes Section within the National Security Division.  She was part of the Cyber section since 2011, and served as its Deputy Chief from 2014 to August 2015.

Ms. Wilkison has prosecuted numerous cyber and intellectual property cases arising from computer hacking, Internet fraud, identity theft, cyber stalking, Internet piracy, theft of trade secrets, and the sale of counterfeited trademarked or copyrighted goods.  She has prosecuted several high-profile cyber cases, including a case against a sextortionist who victimized hundreds of young women and who was referred to by the judge as a “sexual cyber terrorist,” cases involving the use of malware to gain access to the computers of well-known companies and celebrities, and a case wherein extremely valuable trade secrets were stolen and distributed to competitors.  She also led the team in the Apple litigation following the San Bernardino terrorist attack, and supervised the team investigating the Sony cyber attack.

Prior to joining the Cyber and Intellectual Property Crimes Section, Ms. Wilkison served as a Deputy Chief of the General Crimes Section where she trained new AUSAs on prosecution skills and trial techniques, and was a member of the OCDETF Section where she prosecuted large-scale drug trafficking cases.  Prior to joining the United States Attorney’s Office, Ms. Wilkison clerked for the Honorable Franklin VanAntwerpen, United States District Court, Eastern District of Pennsylvania.  She graduated from Harvard Law School.

Stephanie S. Christensen - Acting Executive Assistant United States Attorney

Stephanie S. Christensen is the Acting Executive Assistant United States Attorney. Ms. Christensen joined the United States Attorney’s Office in 2008. She has been part of the Cyber Section since 2010, and served as its Deputy Chief from August 2015 to March 2017. She is a National Security Cyber Specialist and has served as the Intellectual Property Crimes Coordinator.

Ms. Christensen has prosecuted some of the section’s most notable cases. She was one of two lead prosecutors on the investigation into the cyber intrusion at Sony Pictures Entertainment, one of the most destructive cyber-attacks on U.S. soil. In 2015, she received the prestigious Director’s Award for Outstanding Cyber Investigation from the Director of the FBI for her leadership in that investigation.

Ms. Christensen was part of the team that filed litigation against Apple Inc. following the San Bernardino terrorist attack. She has also (co)prosecuted numerous cyber and intellectual property crime cases including the prosecution of Luis Mijangos, a hacker and sextortionist who used malware to control victim-computer webcams and microphones; the prosecution of several members of LulzSec, an international “hackavist” group that stole and published data from victim companies while taunting the victims over social media; and the prosecution of an ex-employee of an avionics company who stole his former employer’s trade secrets and distributed them to competitors.

Prior to joining the Cyber Section, Ms. Christensen was a member of the OCDETF Section where she co-tried a case against Dr. Masoud Bamdad, a medical doctor turned drug dealer, who received a 25-year prison sentence for sales of oxycodone prescriptions which contributed to several overdose deaths.

Ranee Katzenstein, Chief of Trials, Integrity and Professionalism

A 20-year veteran of the office, Assistant United States Attorney Ranee Katzenstein served in several units in the Criminal Division before becoming a Deputy Chief of the Major Frauds Section in 2007. Ms. Katzensten has prosecuted narcotics offenses, violent crime cases and the full panoply of financial fraud matters. Ms. Katzenstein has secured convictions against corporate officers and hedge fund managers who used various schemes to defraud investors, a corporate director who engaged in insider trading, bank insiders who took bribes, finance professionals who embezzled millions from their clients and attorneys who assisted in these schemes. During her tenure in the Office, Ms. Katzenstein has been involved in numerous jury trials, including mentoring dozens of young prosecutors in their first trials. She has also worked on nearly 50 appellate matters and has argued over a dozen cases before the U.S. 9th Circuit Court of Appeals. Ranee graduated with honors from both Wesleyan University and Stanford Law School, and she clerked for 9th Circuit Judge William A. Norris. Before embarking on her legal career, Ms. Katzenstein obtained a doctorate in Art History from Harvard University, was a curator of illuminated manuscripts at the J. Paul Getty Museum, and taught medieval art and architecture at UCLA.

Dennise Willett, Chief of Santa Ana Branch Office & Counsel to the U.S. Attorney

Dennise Willett has served in the Justice Department for the last 19 years.  After four years as agency counsel for the Immigration and Naturalization Service, Ms. Willett became an Assistant United States Attorney in the Southern District of California.  While in San Diego, Ms. Willett was assigned to the newly-formed Counterterrorism Section and oversaw Operation Game Day, resulting in successful prosecutions of threats to Super Bowl XXXVII.  In 2003, Ms. Willett transferred to the Central District of California, Riverside Branch Office, where she prosecuted various crimes including bank fraud, embezzlement, violent crimes, child exploitation, narcotics trafficking and firearms violations.   In 2005, Ms. Willett received the Anti-Defamation League’s Sherwood Prize for Combating Hate in recognition of successful prosecutions of white supremacist gang leaders in Yucca Valley.  In 2008, Ms. Willett was promoted to Deputy Chief of the National Security Section in Los Angeles.  In that capacity, Ms. Willett successfully prosecuted a purported member of the anti-Castro terrorist group, Alpha 66, for stockpiling explosives, machineguns and over 1,600 firearms behind false walls and bookshelves at his personal residence.  In June 2010, Ms. Willett was promoted to Chief of the Santa Ana Branch Office.  Ms. Willett oversees federal criminal prosecutions in Orange County and manages day-to-day operations in the Branch.  In 2012, Ms. Willett received the Anti-Defamation League’s Sherwood Prize for Combating Hate for prosecuting members of Public Enemy Number One, a white supremacist group in Orange County.  In 2013, Ms. Willett successfully tried, convicted, and denaturalized Jorge Sosa for providing false statements to the United States about his participation in the massacre of villagers in Dos Erres, Guatemala.  In July 2015, Ms. Willett was appointed as Senior Counsel to the United States Attorney.  Ms. Willett serves as Senior Counsel, advising the US Attorney on district-wide issues, in addition to serving as Santa Ana Branch Chief.

Max Shiner, Special Counsel to the U.S. Attorney for Violent Crime

Max Shiner has been in the Office since 2008. Mr. Shiner is a graduate of the UCLA School of Law and the University of California, Berkeley. Prior to becoming Special Counsel, Mr. Shiner served in the Violent & Organized Crime Section (“VOCS”) and served as the Project Safe Neighborhoods Coordinator for the Office from 2014-2017. He has prosecuted a variety of VOCS-related crimes, including drug trafficking, gang, RICO, child pornography, firearms possession and trafficking, and murder cases, among others. In 2012, he indicted two defendants in the murder of a United States Coast Guard Chief Petty Officer, who was killed when Mexican drug smugglers found near the Channel Islands off of the coast of California rammed a Coast Guard small boat in an effort to escape arrest. As lead counsel in the trial in 2014, he obtained guilty verdicts for both defendants on all counts, and a life sentence for the lead defendant. In 2014, as co-counsel, Mr. Shiner indicted a 72-defendant, 121-count RICO case involving the Broadway Gangster Crips, which charged the various gang member defendants with murders, shootings, robberies, and drug trafficking, among other crimes. Mr. Shiner and his co-counsel recently concluded a trial for one of these defendants, who was convicted on all counts (including findings that the objects of the RICO conspiracy included murder, robbery, and witness intimidation), and faces life imprisonment. Prior to joining the Office, Mr. Shiner was a Los Angeles Deputy City Attorney for 11 years.

Updated December 13, 2017

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