Speaker verification is the task of estimating how likely it is that two speech recordings come from the same speaker, while speaker identification tries to match a speech recording with one of a greater number of candidates. Both are important forensic linguistics/phonetics tasks and crucial for law enforcement.
Google and other sources told me that a range of phonetic features such as pitch range, long term formant frequencies, speech rate and articulation rate are used in these tasks. Unfortunately all sources I found were fairly general. My question is: Which of these (and other phonetic features) are considered most reliable and are most commonly used? If it's important for answering the question, I'm mostly (but not exclusively) interested in English here. Also, answers should ideally refer to (academic) sources.