A report detailed the missed warning signs and motives of the Uvalde gunman

People visit a makeshift memorial to the victims of a shooting at Robb Elementary School outside the Uvalde County Courthouse on June 30.

Chandan Khanna / Chandan Khanna

Texas officials have offered the clearest picture yet of the gunman who killed 19 children and two teachers at Robb Elementary School in Uvalde, Texas.

It comes as part of a 77-page Texas House committee report that is the most thorough evaluation so far of the security of the school, missed warning signs about the shooter and the law enforcement response to the May 24 shooting.

Investigators describe 18-year-old Salvador Ramos as an isolated individual who became obsessed with school shootings after many years of struggling at home and at school, but who received no mental health support.