Effects of the dynamite charge on the deliberations of deadlocked mock juries.

Smith, V. L., & Kassin, S. M. (1993). Effects of the dynamite charge on the deliberations of deadlocked mock juries. Law and Human Behavior, 17, 625-643.

No impact on verdicts of dynamite charge given after 20 min of deliberation in deadlocked juries, but minority faction jurors changed votes at a higher rate
afterward, and subsequent deliberation was briefer when initial majority favored conviction. Final verdicts strongly related to initial preference distribution. Fewer informational statements over time in dynamite juries, especially among minority jurors.

http://web.williams.edu/Psychology/Faculty/Kassin/files/Smith_Kassin_1993.pdf