Arrest by police does not at this stage mean any more than gathering of evidence from any suspect who may have involvement in a criminal act. It is at the charging stage that more detailed information will be made public. All that is known so far is that the Mckay duo and Henderson have been mentioned in various press articles as candidates for involvement. For all we know the owners of the aircraft may also be on the list of likely candidates for a tete a tete under the lamp.
I wonder if anyone have seen or heard of cops sniffing around asking questions around various airfields and hangars, calling to see log books, tech records and airfield movement records.