'Now look closely this is important, do you recognise me?'

Was Jason Lennon hypnotised years ago to protect red johns identity? And the tap on Patrick's shoulder at the end of that scene, Kirkland has got to be massively involved now.

At loreleis death scene he turns away and smirks as Patrick sees the damage done.

He threatens Lisbon when she starts her investigation into volker, which still hasn't been explained yet, Patrick kind of recognised his voice after he had crashed to help lorelei escape a few episodes ago.

When Patrick and Robert 'first meet' its almost a relief for Kirkland when Patrick says 'do I know you?'

I used to hate the idea of him being red John and I may still be proven wrong but the evidence is piling up now, it's hard to argue against, the only other explanation is that he is red johns right hand man.