INCIDENT CRIMINAL REPORT 1 Alameda County Sheriff?s Of?ce Agency: ETS ORI: CA00100000- Case Number: 157019904 Supplement Information Supplement Date Supplement Type Supplement Of?cer 12/22/2015 09:06:50 GENERAL SUPPLENEENTAL (201719) LYDON, KEITH Contact Name Supervising Of?cer (109671) DESOUSA, ANTHONY 3686 Supplement Narrative 1 On November 17, 2015, while working as detective for the Alameda County Sheriff? 5 Of?ce (ACSO) Special Victims Unit, I was directed by Detective Sergeant A. DeSousa to review report 15-19904 and write a search warrant for the suspect, Stanislav Petrov, recovered cell phones. Two Samsung cell phones were recovered during the incident and placed into evidence at the Eden Township Substation (ETS). One of the Samsung cell phones was recovered from the center console of the stolen Mercedes; and the other Samsung Galaxy Note 4 cell phone was recovered from Petrov?s person. I authored two separate search warrants based on the information I obtained and reviewed, for the recovered cell phones. On November 17, 2015, I presented the search warrant for the Samsung cell phone recovered from the Mercedes to the Honorable Superior Court Judge Michael Gaffey, at the Hayward Hall of Justice heated at 2440 Amador in Hayward. Judge Gaffey reviewed and signed it at 1620 hours. On November 19, 2015, I presented the search warrant for the Samsung Galaxy Note 4 cell phone recovered from Petrov?s person to the Honorable Superior Court Judge Kevin Murphy, at the Hayward Hall of Justice located at 2440 Amador in Hayward. Judge Murphy reviewed and signed it at 1 127 hours. Following the authorization of the search warrants, I ?lled out an Alameda County Digital Multimedia Examination request forms and sent the cell phone to the Alameda County Sheriffs Of?ce crime lab for analysis. On December 2, 2015, about 1114 hours, I retrieved the DVD containing Petrov?s Samsung Galaxy Note 4 data extraction from the Evidence Unit, at the Eden Township Substation and reviewed it. The DVD contained multiple images and videos of Petrov brandishing a silver semi-automatic handgun and driving a white Mercedez Benz. This is a supplemental to report 15?19904. Case Status: Printed: 2/26/2016 10:11 Page 37 of 62'