Seen them countless times because I live 14 miles from the Cape. The booster returned but the second stage did not burn. It was LIGHTS OUT at separation. The rocket took a very steep trajectory, at least 20 degrees to vertical from normal. Rocket went dark at the end of first stage and the booster could be seen. Sonic boom confirmed on booster re-entry, but no way satellite could have been deployed. A very bizarre phenomenon when compared to all prior launches.