Victims
As of Season 5, Red John has killed a number of people, mostly women. In the series pilot, a copycat killer claims in a letter that he has killed 12 women (he claims to have "12 wives" in the letter). This means that only 11 women are killed by the real Red John at the time of episode one. In the episode "Red Dawn", when Jane first joins the CBI, he states at that time Red John was known to have killed 10 people. After Jane kills Timothy Carter he tells the jury that Red John killed "at least 28 people".
Read more about this topic: Red John