Plot hole: The Kansas police arrest Bellick for, and he is subsequently convicted of, Geary's murder based in part on a threatening voice mail he left on Geary's phone. But the message's time and date would match the records of Bellick's admittance into the hospital, thus proving him innocent of the crime.
Plot hole: In this episode, Kellerman insists that there is no way of identifying Stedman. The brothers ask about DNA, dental records, etc. Kellerman states that they were erased. However, Stedman's DNA can always be tested and compared to that of the presidents. DNA will show that they are siblings. There is no "erasing" that.