When he found out that they were studying the Bible with Jehovah’s Witnesses, he accepted an invitation to their meetings. Later a formal Bible study was started with him.
Kad Giljermo uzzināja, ka šie ieslodzītie mācās Bībeli ar Jehovas lieciniekiem, arī viņš piekrita apmeklēt Jehovas liecinieku sapulces un vēlāk sāka mācīties Bībeli.