Federal Criminal Defense Attorneys

Experienced.  Aggressive.  Successful.  Nationwide.


Joshua Sabert Lowther, Esq., and Murdoch Walker, II, Esq., are accomplished federal criminal defense attorneys.  Their practice focuses on the representation of persons and corporations that have been accused or convicted of committing federal crimes.  They also represent clients in state courts, and before administrative agencies and tribunals, in cases in which the United States of America, or the “Government,” defers a federal investigation or prosecution to state or administrative authorities for resolution.  Mr. Lowther and Mr. Walker represent both individual and corporate clients during all stages of federal criminal prosecutions and post-conviction relief matters, including pre-indictment investigations, proffers of evidence, pre-trial litigation, jury and non-jury trials, sentencing hearings, direct and discretionary appeals, habeas corpus actions, sentence reductions and modifications, early-terminations and alleged violations of probation and supervised release, both civil and criminal asset-forfeiture actions, and international extraditions.  They take a very aggressive approach to defending clients, and have achieved outstanding results for them in federal trial and appellate courts throughout the nation.

Mr. Lowther and Mr. Walker have the ability to represent any client in any federal trial, appellate, administrative, or tribal court in the nation, and they are available to do so at anytime.

HHS - OIG | Federal Criminal Defense Attorneys | Lowther | Walker | National Federal Defense GroupFederal criminal cases are vastly different from other types of criminal cases.  The rules of procedure are unbending; the charges are usually complex; and the penalties are severe.  Furthermore, the Government spares no expense or resource in its attempting to obtain convictions and seizing the valuable assets of individuals and corporations that are under investigation for, or have been charged with, the alleged commission of federal crimes.  If you are a subject or the target of a federal investigation, your or your corporation’s assets have been seized, or you have been charged with a federal crime, you need serious and experienced legal representation.  That is what Mr. Lowther and Mr. Walker provide: innovative and effective solutions to your federal criminal problems.

Secret Service | Federal Criminal Defense Attorneys | Lowther | Walker | National Federal Defense GroupMr. Lowther and Mr. Walker are the founding partners of the federal criminal defense law firm Lowther | Walker LLC, which is based in Atlanta, Georgia.  The firm’s proximity to the Hartsfield-Jackson International Airport provides Mr. Lowther and Mr. Walker easy access to multiple, daily-scheduled flights, which enables them to represent clients anywhere in the nation on a moment’s notice.  This proximity also makes them and their firm easily accessible to those clients, regardless of whether they travel to those clients, or those clients choose to travel to them.  Mr. Lowther and Mr. Walker understand the time-sensitive nature of federal criminal cases, and they are ready to take on the fight at any time.

Business man in handcuffs | Federal Criminal Defense Attorneys | Lowther | Walker | National Federal Defense GroupMr. Lowther and Mr. Walker welcome the opportunity to win your case.


“I have known [Joshua] for the past nine years, and I have worked with him on numerous federal criminal matters.  He possesses an encyclopedic knowledge of federal criminal law and procedure; he works well with his clients and other attorneys; and he is a gifted trial lawyer.  [Joshua] is a tireless and zealous advocate for those whom he represents.  I look forward to working with him in the future.” – Harry D. Dixon, Jr., Esq. (federal criminal defense attorney and former United States Attorney)

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“I have sat front row seat to Murdoch’s comprehensive career in criminal investigations and law; an extremely hard worker, he is dogged in his dedication to his craft, extremely talented, an overachiever, and intensely honest.  He has spent his career defending others; and in an age when the legal profession’s integrity is often maligned, I am always happy to see Murdoch—a man of high moral character—amidst our ranks.  Without hesitation, I would trust his abilities in the representation of those faced with the most complex and challenging of legal troubles.” – John M. McCallum, Esq., (attorney and managing partner at Robinson, Kriger & McCallum in Portland, Maine)

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“[Josh] has a presence.  He’s very much the man on top of his game in court.  He’s fearless, leaving no avenue unexplored, no matter the dangers . . . .  If you need a lawyer with a presence, with skill, with determination and courage, you need Josh Lowther.” – James Dangerfield, Esq. (federal and state criminal defense attorney and former Assistant Solicitor General)

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“Being a great advocate for a defendant isn’t just knowing the law. It’s about knowing people, understanding their stories and experiences.  It’s relating to your client.  Murdoch Walker does this as well as any attorney I know.  He’s the guy I want in my  corner no matter the situation.” – Radney H. Wood, Esq. (attorney with Vela Keller in Austin , Texas)

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“Mr. Lowther is an outstanding lawyer . . . .  He is a very educated, honest, understanding lawyer who alleviated a lot of our concerns and worries.  He is a very down to earth lawyer who . . . worked with me and my husband through our difficult time and showed care and concern for us even after our case was over.  Give him a shot; you won’t regret it.” – T.F. (wife of former client)

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“I just heard from [client] and it played out the way you said.  He has probation but no jail or house arrest . . . .  [We] are thrilled.  Thank you so much for handling the case so effectively and for all your information and updates as the case progressed.” – D.S. (family member of former client D.S.)

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“Mi abogado favorito.” – G.D. (former client)