Merseyside Police said that officers from Lancashire Constabulary had arrested a 51-year-old man for being unlawfully at large last night.
The man, who was not named, was arrested in Blackburn, Lancashire, at around 9.15pm.
Inquiries to locate Pickering were continuing.
More top news
MI5 face mounting pressure over claims the IS executioner 'Jihadi John', named yesterday as a London graduate, was known to them
Labour leader Ed Miliband is due to set out his party's plans on how it would cut tuition fees.
New drug driving laws are to come into effect next week, including laws on some prescribed medications.