The way in which TrueCrypt "became abandoned" does not inspire confidence as well. Considering they left a cryptic and very strange exit note that many perceived as a notice of law enforcement activity.
The full story about him is fascinating and well worth the read.[1]
[0] http://www.newyorker.com/news/news-desk/the-strange-origins-...
https://en.wikipedia.org/wiki/E4M
https://en.wikipedia.org/wiki/Paul_Le_Roux
Although TrueCrypt existed since 2004 he ordered his employees around 2007 to use E4M (which would be improbable if he really developed TrueCrypt). The developer (or developers) of TrueCrypt isn't publicly known.