The ProfessorBrainbridge cites CEI`s Hans Bader on the Dodd-Frank mineral rules:
According to a working paper from Dominic P. Parker of the University of Wisconsin and Bryan Vadheim of the London School of Economics, there's strong evidence to suggest that "conflict mineral" regulations in Section 1502 of Dodd-Frank directly led to an increase in looting in affected regions of the Congo. . .conflict mineral regulations converted many of the DRC's militia groups from "stationary" bandits, which extract taxes from people but otherwise do little harm, into what are known as "roving" bandits.
Hans Bader also has a helpful summary analysis of the conflict minerals question.