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About me

Several years ago I decided that I would no longer be satisfied with just reading blood alcohol test results and listening to local experts who say blood tests results are accurate and can't be challenged.  So I decided to investigate this issue myself.  I read untold numbers of articles and books by experts from around the world and I also joined the National College for DUI Defense.  I am very glad I did.  Not only are there problems with the accuracy of blood tests, I have found that in a lot of the counties I go to, the very admissability of the tests is a major problem for the prosecution.

Since I came to this realization I now even spend more time learning about this subject as well as all aspects of defending DUI cases.  Not only that but i am constantly learning how to present this information to judges and juries so they can understand what I am telling them which leads to good results for my clients.   


Practice areas


  1. DUI & DWI: 50%
    16 years, 1.4 thousand cases
  2. Criminal Defense: 50%
    16 years, 2 thousand cases



Fixed (sometimes)

Payment types:

Cash, Check, Credit card

Attorney endorsements

24 total 

Are you an attorney? Endorse this lawyer

  • John Milton Cook

    Brian is an outstanding trial lawyer that I would hire without question if I was ever needing a criminal lawyer. Brian is one of the premier authorities in the areas of alcohol and drug detection and analysis through his constant scientific training, making him the go to attorney for those accused of DUI and drug related offenses.


    John Cook DUI & DWI Attorney
    Relationship: Fellow lawyer in community

  • Stephen David Handy

    I endorse this lawyer. I was referred to Brian by another well known DWI attorney in Texas as someone who had great understanding of the issue inherent in a DWI hospital blood draw case and as someone who could assist me with my understanding of the complicated issues in my case. When I reached out to Brian he quickly responded to me and provided an incredible assistance to me. He demonstrated a very impressive knowledge of the issues an attorney could expect to deal with when handling a DWI hospital blood draw case. He also provided me with references and materials to help me prepare that I would of had a hard time finding anywhere else. If Brian works half as hard for his clients as he did for me, they are well served. I am certain if you are in need of a DWI attorney in or near Bellefonte, PA., Brain Manchester will serve you well.


    Stephen Handy Criminal Defense Attorney
    Relationship: Worked together on matter

Contact info

124 W Bishop Street
Bellefonte, PA, 16823-1927


We have not found any instances of professional misconduct for this lawyer.
Avvo contributions
Legal answers
Award nameGrantorDate granted
Mastering Scientific Evidence (Speaker and Attendee)NCDD2015
Zealous Advocasy in Sexual Assault and Child Victim CasesNACDL2014
Forensic Principles of DUID IIAmerican Chemical Society2014
Forensic Metrology Course GraduateNational College for DUI Defense2014
ACS-CHAL Lawyer-ScientistCertified Lawyer-Scientist by the American Chemical Society2014
DNA for Lawyers IGreg Hampikian2013
Forensic Drug AnalysisAmerican Chemical Society2013
Forensic Chromatography Theory and Practice IXAmerican Chemical Society2013
SFST Instructor CertificationNHTSA2012
Scien. Truth - HS-GC-FID & Pharm. ETOH, Marij., BenzodiazepinesDr. Jimmie Valentine, Ph.D. and Justin McShane Esq.2011
Forensic Chromatography: Theory and PracticeAmerican Chemical Society2010
Intro. to Advanced Topics in Analytical Chemistry and MetrologyMcShane Firm, LLC.2010
Forensic Chromotography: Theory and PracticeProfessor Harold McNair, Ph.D. and Lee Polite, Ph.D.2010
NHTSA/IACP (DRE) Overview CourseLance Platt2010
DUI Detection & Standardized Field Sobriety TestingRon Lloyd & Tony Corroto2010
Work experience
TitleCompany nameDuration
OwnerManchester and Associates2000 - Present
Association namePosition nameDuration
Driving Under the Influence Defenders AssociationFounding Member2014 - Present
National Association of Criminal Defense LawyersMember2013 - Present
Society of Forensic ToxicologistsAssociate Member2012 - Present
Pennsylvania Association of Drunk Driving Defense AttorneysChairman of Education Committee2011 - Present
American Chemical SocietyGeneral Member2011 - Present
National College of DUI DefenseGeneral Member2009 - Present
Legal cases
Case nameOutcome
DUI AccidentAll Charges Dismissed
DUIDUI dismissed and settled for a traffic ticket and 25 fine.
Second Offense DUI withdrawn at preliminary hearing.Case dismissed at preliminary hearing
See all legal cases 
School nameMajorDegreeGraduated
Thomas M. Cooley Law SchoolLawJD - Juris Doctor2000
Speaking engagements
Conference nameTitleDate
Mastering Scientific EvidenceHospital Based Blood Testing2015
Presentation to the in house counsel of a Fortune 200 companyHow science can help your bottom line.2014
PADDDA SFST Workshop for Public DefendersDUI2013
PADDDA Public Defenders Training InstitutePhase II: Personal Contact Phase of the Vehicle Stop2012
USA Bail Annual MeetingForfeiture of Bail for Violation of Conditions2006