Q: In this task, you need to generate an appropriate title for the given summary of some paragraph. The generated title must be short and should include the main topic of the given text. Your summary should be less than 20 words long.
A university lecturer who blackmailed people he met online into sending him degrading photos including acts of paedophilia has been jailed for 32 years. Dr Matthew Falder's conviction is thought to be the first UK prosecution related to sadistic "hurtcore" material located on the dark web. It follows a four-year, worldwide investigation involving security services from the US, Australia, New Zealand, Israel and Europe.
A:
Matthew Falder: How global taskforce caught Birmingham paedophile