At the end of Taking Lives we see that it was James Costa aka Martin Asher who is the real killer. But by that time this is discovered he has had sex with
the-rifleman
big-hero-6
miss-world
the-strain
the-matador
heavyweights
howard-the-duck
money-monster
the-invisible-man
jl-the-new-frontier
flash-of-genius
blochin
captain-phillips
mighty-orbots
escape-from-alcatraz
42
pretty-little-liars
tokyo-love-story
fist-fight
case-39
the-exorcist-iii
modern-family
thirst
chicago-fire
ex-machina
kanchana
a-star-is-born
death-on-the-nile
justified
the-holiday