Culprit adjectives are listed in this post. Each word below can often be found in front of the noun culprit in the same sentence. This reference page can help answer the question what are some adjectives commonly used for describing CULPRIT.
actual, alleged, biggest, chief, common
first, guilty, likely, little, main
major, obvious, only, other, poor
possible, primary, prime, principal, real
true, unfortunate, unhappy, worst, wretched
Hope this word list had the adjective used with culprit you were looking for. Additional describing words / adjectives that describe / adjectives of various nouns can be found in the other pages on this website.