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Thousand Oaks – Assault Weapon Arrest

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


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

Approved by:   Captain Bill Schierman