Tarin has been practicing law for over 30 years, primarily in the areas of civil litigation and criminal defense. His claim to fame was the 1999 criminal defense of a 12-year-old charged with murder based on a false confession. The events of that case lead to a mid-life crisis with severe depression in 2010. Tarin credits Shamanic plant medicine with curing his depression and saving his life. Since then, Tarin has focused his law practice on advocacy/defense of entheogenic plants. In 2022, Tarin helped a nurse in Indiana who was facing 25 years in prison for growing psilocybin mushrooms to relieve her treatment-resistant depression. In 2023, Tarin helped a Boston area police officer receive permission from his department to attend a psychedelic church. Tarin continues to help members of the Psychedelic community facing criminal charges and advising/consulting on religious protections.