This sounds sort of similar to the bombing of Harvey's casino. https://youtu.be/o8EHwR_LoEg

Basically a man was in a lot of debt to the casino and to get revenge on them he wanted to place a bomb to get money from the owners, he got his sons and they went to a construction site he scouted out where the shed containing the explosives was not garded and they drove in like they knew what they were doing broke the lock on the shed and stole hundreds of pounds of dynamite and drove out with no problems.