Shooter at Joel Osteen church bought weapon legally despite history of mental illness

Police identified the shooter as Genesse Ivonne Moreno , 36 , who opened fire in a Texas megachurch on Sunday .

Moreno had previously been placed under an emergency detention for a mental health emergency in 2016 .

Moreno 's mother-in-law said Moreno had been taking medication for schizophrenia.

Neighbors in Conroe , Texas , say Moreno had harassed, threatened and brandished firearms at them.

Moreno was shot dead at the scene by off-duty police officers who returned fire and killed Moreno 's seven-year-old son.