The LAPD Experience The LAPD Experience Los Angeles Police - - PowerPoint PPT Presentation

Greg Matheson B8927@lapd.lacity.org

The NIJ DNA Property Crimes The NIJ DNA Property Crimes Demonstration Program Demonstration Program

The LAPD Experience The LAPD Experience

Los Angeles Police Department Los Angeles Police Department William J. Bratton William J. Bratton Chief of Police Chief of Police

Greg Matheson, Director Criminalistics Laboratory Los Angeles Police Department

The Plan The Plan

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Burglary (residential and Business) Burglary (residential and Business)

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Only evidence items with high likelihood Only evidence items with high likelihood for full profiles for full profiles

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Responding officers recognize potential Responding officers recognize potential evidence evidence

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SID called for collection SID called for collection

Program Statistics to Date Program Statistics to Date

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Total Scenes where evidence was collected: Total Scenes where evidence was collected:

– – 192 192

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Scenes Scenes w/uploadable w/uploadable profiles profiles

– – 123 (68.7 %) 123 (68.7 %)

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Uploaded profiles that hit to an offender Uploaded profiles that hit to an offender

– – 75 (61%) 75 (61%)

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Uploaded profiles that hit to another case Uploaded profiles that hit to another case

– – 22 (14%) 22 (14%)

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Total cases aided by a CODIS hit: Total cases aided by a CODIS hit:

– – 97 of the 192 (51%) 97 of the 192 (51%)

Program Statistics to Date Program Statistics to Date

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Arrests Arrests

– – For study cases (n= 192) For study cases (n= 192)

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Total arrests 75 Total arrests 75

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58 directly related to DNA results 58 directly related to DNA results

– – For Control cases (n= 197) For Control cases (n= 197)

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Total arrests 27 Total arrests 27

Status of DNA and Property Status of DNA and Property Crimes in Los Angeles Today Crimes in Los Angeles Today

Not a regularly provided service DNA on burglaries require special circumstances Focus is still on violent crimes

Why Consider DNA on Why Consider DNA on Property Crimes? Property Crimes?

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2003 2003 -

• 15,284 Residential burglaries city wide

15,284 Residential burglaries city wide – – 4,988 in Valley Bureau 4,988 in Valley Bureau

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2004 2004 -

• 14,113 Residential burglaries city wide

14,113 Residential burglaries city wide – – 4,762 in Valley Bureau 4,762 in Valley Bureau

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2005 2005 -

• ~ 13,300 Residential burglaries city wide

~ 13,300 Residential burglaries city wide – – ~ 4380 in Valley Bureau ~ 4380 in Valley Bureau

Target Area for Program Target Area for Program

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Valley Bureau Valley Bureau

Population City wide ~4.1 million Valley Bureau 1.27 million Size City wide 468 sq miles Valley Bureau 221.8 sq miles

Challenges Challenges

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Who will do the collection? Who will do the collection?

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Officer Training Officer Training – –7 stations 7 stations – –> 2000 officers and detectives > 2000 officers and detectives

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Insufficient number of residential Insufficient number of residential burglaries with evidence burglaries with evidence

Challenges Challenges

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Analysis turn around time Analysis turn around time

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Detectives with cases in the control Detectives with cases in the control group group

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Detectives with cases with biological Detectives with cases with biological evidence in other bureaus evidence in other bureaus

What we were trying to learn What we were trying to learn

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Is there any DNA evidence at burglary Is there any DNA evidence at burglary scenes? scenes?

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Can officers successfully identify Can officers successfully identify potential evidence? potential evidence?

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Can non Can non-

• criminalistics

criminalistics staff collect the staff collect the evidence? (Or better yet, will they?) evidence? (Or better yet, will they?)

What we were trying to learn What we were trying to learn

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Are hits obtained to identify the Are hits obtained to identify the perpetrator of the crime? perpetrator of the crime?

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Can all of this occur before the statue of Can all of this occur before the statue of limitations expires? limitations expires?