I believe that framing people for possession of child pornography is a widespread practice, and that this accounts for almost all convictions on that charge. I base this on the evidence that is typically used in such cases, all of which comes from computers which may have been compromised; and in fact, trials usually mention evidence that the computers in question were compromised (although it's possible for an attacker to remove all evidence of that fact), and that hasn't been a successful defense. If a person were to actually want child pornography, ther...
The traditional murder motives apply: revenge, and eliminating rivals. Revenge seems like it would be the most likely motive.
There have been cases in which prosecutions were based solely on the use of a credit card number which the owner claims must have been stolen; those cases most likely involve card numbers which really were stolen, but from a random victim, not to frame someone in particular. However, those cases are publicly visible evidence that framing someone is easy, and at least some malefactors must have noticed.
People convicted would tend to m... (read more)