Sorry,
Despite his "extensive training" I'll still go with the security officers second option of just acting in a "pique". Like there's nothing that we use in maintaining aircraft every day that couldn't make a potent explosive device.
By the way, I have successfully completed a SIA level 4 security licence course and use the licence to scrape the ice off my windows in the winter
and last night one of my aircraft had a valve cap missing on arrival. I replaced it and requested a full criminal investigation to commence at the departing station.