Doug & Wolf hypothesized this morning that the 30 min meeting might have (at least partly) been the Cards laying out the process in detail that he needs to follow, and then putting it on him/his agent on if they were even willing to follow that process.
Definitely not out of the question that DWash and his agent, after seeing the Cards requirements for taking him back, decided a fresh start somewhere else would be the better route.
Per Florio @ PFT: "The Cardinals decided to release Washington after discussions with the player and negotiations with his representatives did not result in an agreement between the two sides. Per a source with knowledge of the situation, the Cardinals had interest in keeping Washington, but his anticipated role in light of the additions the team has made (including most recently the decision to select linebacker
Haason Reddick with the 13th pick in the draft) prevented the two sides from identifying an arrangement that was suitable for the team and the player."
Perhaps he thought he'd just waltz back into the starting lineup??