Final answer:
Detailed information about the Faber family's experience during the German invasion is not provided, but during World War II, many Jewish families were subjected to detainment and deportation by the Nazis. The Germans kept thorough records, which could have informed the Faber family of the capture. The diary of Anne Frank serves as one example of such experiences.
Step-by-step explanation:
The specific details about who was taken prisoner in the Faber family during the first day of the German invasion and how the Fabers knew about this are not provided in the reference information. However, the context of the period suggests that within the historical frame of World War II, many Jewish families experienced the detainment and deportation of their members due to the widespread Nazi policies of persecution and extermination.
During the war, families often found out about the capture of their relatives through official notices from the German authorities, word of mouth, or witnessing the arrests firsthand. The German administration maintained meticulous records of their actions against Jewish individuals and other groups they targeted, which sometimes included information on who was arrested and where they were taken.
As demonstrated by the experiences of the Frank family and others, being taken during this time likely meant deportation to ghettos, labor camps, or extermination camps. Despite this, some families, like Anne Frank's, managed to go into hiding for a time before being discovered, as detailed in her diary.