Hanratty was innocent.
Michael Gregsten and Valerie Storie were defecting to Russia in 1961. It was during the cold war and these places were under surveillance by security. Their intentions were known. The person who was responsible was Peter Alfonso, who occasionally was used by the security services to do their dirty work. The DNA was planted, as Hanratty and Alfonso once shared a room in a bed and breakfast. Paul Cleeland knew Alfonso !
IMHO
Craigie is well read - his use of the English language knows no bounds.
He had studied people like Hanretty et al and attempts to mimic a mixture of behaviours of these people he has researched to almost an inch of their lives.
He wants to be somebody but he will always be a nobody.
His feelings left him years ago.
He empowers the weak and the bullies.
He attacks the strong and resilent.
He hides from the truth.
He manipulates the minds of others.
Paranoia rules his life.
He lives in a world only known to Craigie.
He attempts to take on the personality of others to attack.
He is everywhere, this is his full time job.
He believes the whole of society is against him and bitterness spurs him on.
He does not feel pain, nor the pain of others.
He plots, he schemes, he lies, he cheats, he will stop at nothing.
He is relentless in his crimes.
He says - he is a keyboard warrior....
In actual fact he cold, creative and devious.
All in all making him one very dangerous man!