Air Conditioner Freon Line Cut

[Kay R.]

I purchased a home a few months ago and a tenant moved in last weekend. The tenant complained that the A/C would not turn on so I sent out our maintenance guy to check it out. He informed us that the freon line was cut. A few months ago, a neighbor told me that there were a few A/C condenser units stolen in the area. I suspect that the thieves tried to steal my unit. Now I'm out of $700 in fixing it. Does anyone know what I could do to prevent this from happening again? The unit already has the black security bars around it, which I believe prevented it from being stolen. Is there and type of security I could purchase to protect the lines being cut? Thank you all!