Texas police have said the gunman who shot 21 people dead at a school last week entered through a door that was supposed to lock, but somehow did not. The Texas Department of Public Safety (DPS), which is investigating the shooting response, confirmed a teacher had initially propped open the door. But a spokesman on Tuesday said the teacher closed the door once the gunman entered the campus. Public anger has risen as new details of the shooting emerge. Initial reports of the gunman getting into the school via an exterior door that was accidentally left open by a teacher had suggested a breach of school policy. Employees at Robb Elementary School are required to keep doors closed and locked. However, an attorney for the unnamed employee told the San Antonio Express-News on Tuesday that she had closed it and “thought the door would lock because that door is always supposed to be locked”.(BBC)…[+]