Forensics man Brett Partridge is a strong candidate for the role of Red John as well as that of Jane's least favourite acquaintance. Fans have noticed similarities between Brett and Red John's voices and also point to the fact someone who may have been Red John wore a forensics windbreaker to gain access to the CBI in Season Two.
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The two-part season finale of The Mentalist starts Friday 3rd June, 9pm on Channel 5.