More than a month after 19 students and two teachers were murdered in the deadliest school shooting in Texas history, questions about what happened during the 77 minutes prior to law enforcement entering the classroom the gunman was occupying are starting to be answered.

The picture that is being painted of the police response by journalists and investigators is one of miscommunication, confusion and inaction. Who is to blame for what Texas Department of Public Safety director Steve McCraw has criticized as an “abject failure,” depends on who you ask.

Today on Front Burner, as anger and scrutiny continues to grow among the families of the victims, politics reporter with The Texas Tribune, James Barragán, tells us about what is known about the police response so far and what’s left to uncover.