install security cameras on commercial building after repeated arson and assault issues ?

Hello,

Looking for advice on a difficult situation. we operate a commercial building in a sort-of-Gewerbehof (our part is commercial, others are residential, its a mix) there is still a public throughway. its quite secluded so its a place where lots of bored teenagers hangout and often cause no issue. however, over the years there have been a few serious incidents (all reported) - bins on fire, intimidation / assault. last night another big fire with fire brigade and police attending / taking statements.

we want to know what we can legally do about installing cameras to make it more safe and protect our people / space. there are residents all around who agree we need to do something, the Hofmeister is hesitant / not so interested. i know there's lots of strong laws about Datenschutz and cameras etc. but cant find a clear answer online.

any tips greatly appreciated, thanks!