Nature of Incident: Assault Weapon Arrest
Report Number: 19-4973
Location: 700 Block of London Circle
Date & Time: 1-10-19 1715 hours
Unit(s) Responsible: Thousand Oaks Special Enforcement Unit, Thousand Oaks Directed
Enforcement Unit, Pharmaceutical Crimes Unit
(S)uspects, (V)ictims, (P)arty, (D)ecedent City of Residence Age
Matthew Hansen Thousand Oaks 22
Donald Haile Simi Valley 23
Narrative:
During the month of September 2018, Thousand Oaks patrol deputies responded to a fatal
overdose in the 700 block of London Circle in the City of Thousand Oaks. Investigators with the
Pharmaceutical Crimes Unit (PCU) conducted an investigation into the overdose death. During
the course of their investigation, PCU investigators gained information about possible illegal
firearms activity in the 700 block of London Circle.
Detectives with the Thousand Oaks Special Enforcement Unit (SEU) assumed the investigation
into the illegal firearms activity. At the conclusion of their investigation, SEU detectives
determined (S) Matthew Hansen had previously resided in the state of Washington and had
obtained a semi-automatic assault rifle and pistol while living in Washington. Detectives
determined Hansen returned to California with the semi-automatic rifle and pistol. Detectives
also determined Hansen was storing those weapons at his residence, located in the 700 block of
London Circle.
Detectives also determined (S) Donald Haile had been in possession of the previously mentioned
firearms and had access to them while at Hansen’s residence. Haile was determined to be
prohibited from owning or possessing firearms due to a prior felony conviction and misdemeanor
domestic violence conviction.
SEU detectives obtained a search warrant to search Hansen’s residence and seize the
previously listed firearms. On January 10, 2019, SEU detectives and deputies with the Thousand
Oaks Police Department’s Directed Enforcement Unit served the search warrant at Hansen’s
residence and located a CMMG MK4 semi-automatic assault rifle, a detachable drum magazine
capable of holding up to 60 rounds of ammunition, several high capacity magazines, a CZ EVO
Scorpion 3 Pistol with high capacity magazine, approximately 250 rounds of .223 caliber
ammunition and approximately 250 rounds of 9mm ammunition.
Detectives subsequently arrested Matthew Hansen for PC 30605(a) – Possession of Assault
Weapon, PC 30600(A) – Import Assault Weapon, and PC 32310(a) – Possession of a Large
Capacity Magazine. Detectives also subsequently arrested Donald Haile for PC 30605(a) –
Possession of Assault Weapon, PC 29800(a)(1) – Possession of a Firearm by a Convicted
Felon, and PC 30305(a)(1) – Possession of Ammunition by a Convicted Felon. Hansen was
booked into the East County Jail for the listed violations, where his bail was set at $100,000.
Haile was also booked into the East County Jail, where his bail was set at $65,000.
Prepared by: Sergeant Greg Gibson
News Release Date: 1-11-19
Media Follow-Up Contact: Detective Scott Baxter (805) 630-1287
Scott.Baxter@ventura.org
Approved by: Captain Bill Schierman
