stolen bikes

Stockton is currently known for the crime rate. Bikes have always been a easy to trade commodity. Usually it is the homeless who take the bike because it is there (JMHO not substantiated) but obviously in your case these people really wanted your new bikes. My father used to advise me that locks, safes, alarms all were to discourage honest people...at least it made them think twice and stay honest. When someone wants something bad enough they will figure a way around the security. My neighbor was burgled years ago, in a rain storm, when someone broke into their house and carried out a 300lb safe through the mud and over a 6 foot wall (you could follow the footprints deep in the mud). These people could have easily gotten jobs in the moving business.
Anyway, our best to you and your wife. Our prayers for recovery.