My landlord illegally entered my apartment without notification or my permission. I caught him on a camera entering and walking around. What legal action can I take against him?

Yesterday I was out at the park with my dog and I got a notification from a camera in my living room that movement was detected. I knew nobody was home and it wasn’t my dog as he was with me. I go and check the camera and it was my landlord entering my apartment. He gave me zero notification and he has zero permission to enter. He also never notified me that he entered after he did. He doesn’t know that I know right now. From the looks of it, he just did a walk-thru, which I never denied him of doing in the past when he asked to do one. However this time was just him entering on his own and thinking that I wouldn’t know. It didn’t look like he was looking around for anything in particular as he didn’t open any cabinets/drawers, and nothing appears stolen.

So it has me thinking. How can I go about this? I feel violated and don’t want this to ever happen again.