Presume the alarm went off and they never got anywhere....
Any how that's why I always think best not to put flash HiFi equipment in a car only invites people. My first car a Uno they took the back window out to steel my parcel shelf speakers I'd put in... all the rage once you know. The second car they didn't get in but think they were after letting off the fire extinguisher that I left in the back of the car, but left an internal door lock indent on the back door where the back door lock hit the side of the car... oh not forgetting where someone sprung the front door of my Uno open or half open... still may be the cat piss smell put them off where my second cat had relieved herself in the cat carrier
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Sympathies… I’ve been more lucky recently.