[RonF]

My late husband was a law enforcement officer who usually worked the nightshift. He routinely checked the doors of buildings after hours, including private businesses, to make sure the buildings were secure.

Did he go in and take pictures?

Did he do this to buildings outside his juristiction, as this cop did (check the article again, right in the beginning)? I bet not.

[ValerieUSA]

He did not go in and take pictures in private businesses, unless a crime had been committed there. Then photos are often taken by officers.
Had he taken pictures while in a public school building - so what?
As far as "jurisdiction" goes... he was a county deputy, if he checked the locks in a school within a city's limits where the city police force has jurisdiction - so what?