if a robber wants your stuff, and has enough knowledge and skills.. they'll get it.. same with people stealing cars.. by installing alarms, locks, getting dogs, etc.. its mainly to deter the robber for a short time.. but if they really wanetd something, theyd get it..
what happend to you PK is a shame because its probably someone you know, and they knew how your alarms / garage were set up.
Rremember to keep your expensive belongings in a industrial style safe (hooked up to a home security system like a.d.t.)..
my jewelry store safes are all rigged this way with our security company within reach as well as local police.. motion sensors throughout the shop, as well as sensors on doors.. plus a few surprises
have your kids be aware of any strange activies friends might be in.. they might know the persons.. it would be good to know in the future ncase something happens again