The criminal-justice system in Waco, Texas, continues to boggle the mind. Last month, a grand jury in McClellan County held a marathon session to consider whether District Attorney Abel Reyna had presented enough evidence to justify indictments in the shootout at a May gathering of bikers where nine people were killed. In the wake of those killings, 177 bikers were arrested. Many proclaimed their innocence, and local authorities faced criticism for jailing so many individuals using fill-in-the-blank paperwork that didn't differentiate among the jailed. Still, the November grand jury session returned 106 indictments at the end of one day, some...