Coincidentally the manuscripts turned out to be high quality Victorian forgeries by The Spanish Forger. Knowledge is an important tool in helping to detect fakes and forgeries. Soviet efforts took many forms, ranging from propaganda, forgeries, and general disinformation to assassinations. This relied partly on manuscripts in Williams's collection, some his forgeries. He also denounced many paintings attributed to him in public and private collections as forgeries. Demjanjuk's defense team argued that these documents were Soviet forgeries. This led to claims that the memos were forgeries. However, historians dealing with recent centuries rarely encounter forgeries of any importance. This group appears to have been made as deliberate forgeries. During the bombing investigation, police discovered evidence of the forgeries in Hofmann's basement. Sites were looted and a brisk trade in forgeries arose. The color artifacts due to demosaicing provide important clues for identifying photo forgeries. The letters were quickly exposed as forgeries. The question of whether the diaries are genuine or forgeries has been much debated. He is skilled in detecting and creating forgeries.