The most logical solution was to carry out the raid on the Detention Center itself. The difficulty was that the jail was located in the town center. Nowadays, many people take it for granted to carry out such an action: War movies, and books written about the war, have painted and created a "glorious" picture in the minds of people. For those who actively were involved as part of the Resistance Movement knew that, if arrested, they could be tortured. Moreover, the possibility was real that the Germans would carry out reprisals against family members. Extreme courage was demanded to do what these men and women of the Resistance Movement did.
Once it was decided to raid the Detention Center, they quickly yet cautiously organized the logistics with regard to weapons, transport vehicles, and addresses to go into hiding to. The group possessed some weapons, and had obtained a few German uniforms. For a number of days they observed the Detention Center and made note of the changing of the guard and how many German police were present at any given time. They received help from a Dutch cooperating warden who worked in the Detention Center.
The selected group who was to carry out the raid met at the address of the parents of Jan and Marie Bulthuis on 10 December 1944. They lived at Kloosterstraat 9. Jan and Mary were two members of the group. The atmosphere in the home was tense yet trustful. The night was spent in prayer but also the weapons were checked for readiness. Also the plan for the raid was rehearsed over and over. The plan was that Marie Bulthuis would keep an eye on the doorway of the Detention Center in order to determine when the night guard would leave. Earlier the group had discovered that between the changing of the outgoing night guard and the incoming day guard some 25 minutes would elapse. Marie would casually walk back to Kloosterstraat 9, a walk of less than one minute, to warn the waiting raiders.