My disc lock was tampered with — what should I do next?

Treat it as what it is: evidence that your bike was selected, tested, and — this time — successfully defended. Tool marks, pry damage, or a shifted lock mean someone got interrupted or decided the job needed different equipment. Both versions sometimes come back prepared.

Your next moves:

• Photograph the damage and file a report. Attempted theft is worth minutes of paperwork — it flags your area for patrols and builds the pattern if a crew is working the neighborhood.
• Don't trust the damaged lock. A stressed mechanism can fail — either seizing on your disc or popping open for the next guy. Replace it.
• Fix the real gap. A disc lock only stops the roll-away; two people can still lift a bike into a van with the lock on. Add a chain from the frame to a ground anchor or immovable object, and a cover so the model isn't advertised.
• Break your pattern. New parking spot if possible, lit and camera-covered.
• Add the layer they can't plan for. A hidden motion-alert GPS tracker turns attempt two into an instant phone alert, and a successful theft into a live location in a 911 call — never a confrontation; police handle the recovery, you supply the dot on the map.

They tested your defenses once. The right response is making sure the retest meets a different bike.

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