Mr Garland considers every case as different and potentially unique. It is often useful to focus on the core issue that a case presents. In a particular case it may be to simply admit that the accused did the "act" being charged, but to point out how that act is protected by the Constitution, by a privilege, or by a statutory right.
The war on crime has many victims. Overall, statistics show that crime has dropped over the past 30 years. Yet arrests must be made to justify the existence of, and funding for, the police-prison industrial complex. Many arrests are made on bare "probable cause" with little investigation to explore other suspects or other non- criminal explanations.
With a degree in chemistry Mr Garland has established a pattern of disputing poor scientific methods and conclusions not supported by research. Scientific evidence appears in just about every criminal case more complex than jay walking.
Other cases involve broader questions of constitutional rights. Why are some police so quick to charge firearm violations for people with no record? In an unsurprising number of cases the arrest violates the person's second amendment rights. Many cases involve such fundamental rights such as privacy, practice of religion, free speech and association. The exercise of constitutionally protected rights is frequently a valid defense to an arrest. Our constitutions do, in fact, retain the power of the government.