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About me

My criminal defense trial practice focuses on alcohol and DRUG offenses, such as driving under the influence (DUI), VGCSA (drug possession), vehicular homicide, and serious traffic violation cases, as well as probation, expungement and parole issues.


I also represent clients in civil litigation cases such as personal injury, defective products, municipality and civil rights liability cases, car, truck and motorcycle accidents, and medical malpractice suits.

Before and during law school, I was a police officer, police trainer and accident investigation specialist.   During my time as a police officer, I worked for the City of Roswell Police Department as well as the Cobb County Police Department. I made over 1000 DUI arrests.  


As a police officer, I received special training in DUI Detection, the Intoxylizer 5000, and Fatality Traffic Collision investigations.  I was involved with criminal, DUI, and traffic cases.  I was also responsible for training of police recruits.

I am certified by the National Highway Traffic Safety Administration (NHTSA) and International Association of Chiefs of Police (IACP) to teach law enforcement agents how to conduct field sobriety tests. This certification and my nine years as a police officer give me unique insight into police procedures, and this extensive knowledge is beneficial to my clients.  I am also a (NHTSA) trained Standardized Field Sobriety Practioner and  a member of the National College for DUI Defense (NCDD). 


Languages spoken: Spanish

Photos and videos

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Practice areas


  1. DUI & DWI: 65%
    9 years, 600 cases
  2. Criminal Defense: 25%
    9 years, 46 cases
  3. Personal Injury: 5%
    9 years, 5 cases
  4. Speeding Ticket: 3%
    9 years, 100 cases
  5. Litigation: 2%
    9 years, 17 cases



Retainer (always), Free consultation (90 minutes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

31 total 

Are you an attorney? Endorse this lawyer

  • Ryan Lansing Russman

    All lawyers have one thing for sale...thier advice. However, there is only one lawyer you should trust with your case. Attorney Yager is a true champion for the citizen that needs effective representation. His skills as a litigator have earned him the recognition and respect of his peers across the United States. I know Attorney Yager both professionally and personaly, and there is no finer man that you can find to protect your home, your job, your family.


    Ryan Russman DUI and DWI Attorney
    Relationship: Fellow lawyer in community

  • William C. Head

    I hired Cory for his first job out of law school several years ago. He was not a "rookie" lawyer, by any means. Now, he is getting unmatched results in court. His 9+ years as a cop, with over 1000 DUI arrests, provided him with a level of experience that usually requires an attorney 5 years to master. Plus, as a field training officer for Roswell Police Department and SFST (Standardized Field Sobriety Test) Instructor, his ability to identify violations of proper police protocol by an officer involved in one of our cases led to reductions in over 75% of his first 50 DUI cases. Cory possesses a level of confidence that is seldom seen in attorneys - regardless of their years of practice. Even if someone asks to hire me, I often have the client begin by hiring Cory. He will then look into the quality of the case first, because his fee is a fraction of mine. My clients really only care about is good results. He gets FANTASTIC results. Two thumbs up for Cory Yager.


    William Head DUI and DWI Attorney
    Relationship: Co-worker

Contact info


GAActive Member in Good Standing 200708/05/2016
We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Rising StarSuperLawyers2016
Rising StarSuperlawyers2015
Rising StarSuperLawyers2014
DUI Negotiator of the yearDODD - Defense of Drinking Drivers2013
Preeminent LawyersMartindale-Hubbell2013
Rising StarSuper Lawyers Magazine2013
Hotshot Lawyer of the YearDODD - Defense of Drinking Drivers2012
Rising StarSuper Lawyers Magazine2012
Certificate of CompletionNational College for DUI Defense2008
Intermediate Law Enforcement CertificationState of Georgia (POST)2004
Intoxylizer 5000 OperatorGPSTC2003
Basic Police Officer CertificationGA POST Council2000
Work experience
TitleCompany nameDuration
PartnerKohn & Yager, LLC2015 - Present
Senior Associate AttorneyHead Thomas Webb and Willis LLC2007 - 2015
Police Officer II / Field Training OfficerCity of Roswell, GA Police Department2002 - 2007
Police OfficerCobb County Police Department1999 - 2002
Association namePosition nameDuration
Georgia Trial Lawyers AssociationMember2009 - Present
Texas Criminal Defense Lawyers AssociationMember2009 - Present
National College for DUI DefenseMember2008 - Present
National Association of Criminal Defense LawyersMember2008 - Present
Georgia Association of Criminal Defense LawyersMember2008 - Present
Legal cases
Case nameOutcome
DUI with .183 breath test results results in not guilty verdictNot Guilty Jury Verdict
.084 Breath Test case results in not guilty verdict against Trooper Dunn of the Dekalb STAR teamNot guilty on ALL DUI counts
DUI with .125 breath test reduced to speeding ticketDUI reduced to speeding ticket with $100.00 fine
See all legal cases 
Publication nameTitleDate
DWI Detectio and Standardized Field Sobriety Testing CourseEffective Cross Examination - Using the Officer's training to flip the script2012
Field Sobriety Testing UpdateStandardized Field Sobriety Testing Update2009
ICLECombatting Field Sobriety Tests and Dealing with the Drug Recognition Expert2009
School nameMajorDegreeGraduated
DWI Detection and Standardized Field Sobriety TestingN/AInstructor at course2014
DWI Detection and Standardized Field Sobriety TestingN/ASpeaker / Completed Course2012
DRE PRACTIONER OVERVIEWN/ACertificate of Completion2012
DWI Detection and Standardized Field Sobriety TestingN/AInstructor at course2012
Personal Injury Law at Sea (Alaska)N/ACertificate of Completion2012
DWI Detection and Standardized Field Sobriety TestingN/ASpeaker2011
Federal District Court for Northern District GAN/AAdmitted to Practice2011
DUI Detection and Standardized Field Sobriety TestingN/ASpeaker2011
John Marshall Law School, AtlantaLawJD - Juris Doctor2007
North Central Georgia Law Enforcement AcademyN/ACrime Scene Processing2007
Georgia Public Safety Training CenterN/AField Training Officer (FTO)2006
North Central Georgia Law Enforcement AcademyN/AOn Scene Accident Investigation - Level II2006
Georgia Public Safety Training CenterN/AOn-Scene Traffic Accident Investigation - Level I2005
Georgia Public Safety Training CenterN/AJudgmental Use of Deadly Force for Law Enforcement2004
Georgia Public Safety Training CenterN/ADUI Detection and SFST Update2004
Georgia Public Safety Training CenterN/AInterpersonal Comm. / Crisis Intervention for Law Enforcement2004
GBI - Division of Forensic SciencesN/AIntoxilyzer 5000 Certification2003
Regional Counter-Drug Training AcademyN/AT-CAP / Criminal Patrol (Drug Interdiction)2003
North Central Georgia Law Enforcement AcademyN/ASearch Warrants and Affidavits for Law Enforcement2003
North Central Georgia Law Enforcement AcademyN/ARadar Recertification2003
Roswell - Alpharetta Public Safety Training CenterN/AStress Management for Law Enforcement2002
North Central Georgia Law Enforcement AcademyN/AVerbal Judo for Law Enforcement2002
North Central Georgia Law Enforcement AcademyN/AFamily Violence Intervention for Law Enforcement2002
North Central Georgia Law Enforcement AcademyN/ACivil Liability for Law Enforcement Officers2002
North Central Georgia Law Enforcement AcademyN/ALaw Enforcement Officer Survival2002
North Central Georgia Law Enforcement AcademyN/ACriminal Procedure for Law Enforcement2002
GA POST CouncilRadar OperatorCertification2001
Cobb County Police AcademyN/APrecision Imobilization Technique (PIT) Certification2001
Police Officer Standards and Training CouncilN/AOther - Bachelors2000
Cobb County Police AcademyN/ADUI Detection and Standardized Field Sobriety Testing2000
Cobb County Police AcademyN/ATraffic Stops and Asset Forefeiture2000
Cobb County Police AcademyN/AUtilization of Asp Baton2000
Cobb County Police AcademyN/AHandling Juvenile Offenders for Law Enforcement2000
Cobb County Police AcademyN/AFirst Responder for Law Enforcement2000
Georgia Public Safety Training CenterN/AEVOC - Emergency Vehicle Operations Course2000
State of New YorkN/AOther - Bachelors1997
State of New YorkN/AIntermediate Firefighter Certification1997
State of New YorkN/AAdvanced Firefighter Certification1997
State of New YorkN/AFirefighter Safety and Survival1997
State of New YorkN/AInitial Fire Attack1997
State of New YorkN/AFire Attack II1997
State of New YorkN/AFire Behavior and Arson Awareness1997
State University of New York, College at OneontaPolitical ScienceBA - Bachelor of Arts1995
GA POSTLIDAR (LASER) CertificationCertificationN/A
GA POSTField Training OfficerCertificationN/A
United States Drug Enforcement AgencyT-CAP (Drug Interdiction)TrainingN/A
GA POSTOn Scene Accident Investigation Level ICertificationN/A
GA POSTOn Scene Accident Investigation - Level IICertificationN/A
GA POSTForensic Mapping with Electronic Total StationCertificationN/A
Bill Daniels Trial Advocacy ProgramN/ATrial Clinic TrainingN/A
DWI Detection and Standardized Field Sobriety TestingInstructorN/AN/A
Texas Criminal Defense Lawyers Assosication - (TCDLA)Stuart Kinard Memorial Advanced DWI SeminarN/AN/A
Cobb County Police AcademyN/ASurvival SpanishN/A
Cobb County Police AcademyN/ADeployment of Oleoresin Capsicum CertificationN/A
State of New YorkN/AEmergencey Medical Technician - DN/A
Headlines Marketing2009 Forensic Blood and Urine Seminar - Atlanta, GAN/AN/A
Headlines MarketingForensic Blood and Urine Seminar - San Diego, CAN/AN/A
GA Bar - ICLEAdvanced Cross Examination TechniquesN/AN/A
ICLE - GA BarCarlson on EvidenceN/AN/A
ICLE - GA BArKISS - Trial Tactics and TechniquesN/AN/A
NACDL / NCDD Las Vegas DUI SeminarN/ACompleted 3 day DUI training courseN/A
Speaking engagements
Conference nameTitleDate
DUI Detection and Standardized Field Sobriety TestingDUI case law update2014
DWI Detection and Standardized Field Sobriety Testing Seminar for Legal ProfessionalsCross examination - Using the Officers training to your advantage2012
DUI Detection and Standardized Field Sobriety TestingDUI - The Legal Environment - A case law review for DUI Practitioners2012
DUI Detection and Standardized Field Sobriety TestingEffective Use of Experts in defending a DUI case2012
DUI and SFST for LawyersDUI Constructive Cross Examination and Use of the NHTSA DUI Detection and Standardized Field Sobriety Manual to show weakness2012
DWI and SFST Testing Practitioner CourseDWI Detection and Standardized Field Sobriey Testing - "The Legal Environment" - A Georgia Case Law Overview2011
GTLA - Annual Convention 2009Different Perspectives: From Police Officer to Defense Attorney2009
GTLA - Annual Convention - 2009Blood and Urine Toxicology in Criminal and DUI Cases2009
Roswell High School - DUI/Alcohol Abuse Teen Open House ForumDUI/Alcohol Laws and Consequences2007