Donald Groves convicted July 3 and August 21 1997

That means all the stuff that happened from season one episode 1 through 7 took place over seven weeks.

Jefferson Keane gets married, suspects his wife of cheating, converts to Islam and gets executed all within a matter of days.

Beecher goes from praggy lawyer to drugged up psychopath in a matter of a few weeks (okay this seems plausible).

O'Reilly and Adebisi, two nobodies, take over the drug trade from the Mafia. Bonus: Adebisi in his four years in Oz prior to the televised documentary does fuck all, and is subordinate to Keane and Markstrom. Both of whom just entered Oz and one of which turned out to be a narc. But Adebisi turns into a kingpin almost overnight.