A DPS sergeant added in his memo: “As this was clearly against established training, we both decided to enter the building where the shooter was located.” DPS director Col. Steven McCraw told CNN, “Yes, absolutely,” when asked if Betancourt was being investigated for telling officers not to go into the hallway.Betancourt was interviewed multiple times in the immediate aftermath of the event and has since become one of seven current and former DPS officers referred for further investigation by the DPS inspector general, CNN has learned from sources close to the events who are not authorized to speak to the media.He told investigators he arrived at Robb Elementary at about 12:45 p.m., a few minutes before the teenage gunman was killed, the sources said.In the course of the investigation, Betancourt told investigators he had no first-hand knowledge of what was going on, including that a specialized Border Patrol tactical unit, BORTAC, was confronting the shooter, according to sources familiar with the investigation.First alerted to the shooting Betancourt, the most senior officer known to be being investigated over the failed law enforcement response, told investigators he had little to do with the operation at Robb Elementary until after the gunman was killed, sources close to the inquiry told CNN."