A number of older malls also never invested in good security. The mall across town I mentioned was a prime example. Crime increased, the owners couldn't or wouldn't deal with it, so people stayed away in droves. I give the mall closer to me credit. It has an active security force that patrols every inch of the mall, including the parking lots. In addition, the local police department maintains a substation in the mall. This mall probably looked at what happened to other malls and decided to take action now before these punks destroyed it as they did at other malls.
Ghetto youth were the main killers of the indoors malls and continue to this day.