'There are warning signs that shouldn't be ignored': Psychologist says 'busy lifestyles' mean parents and teachers can miss indications of a teen shooter - especially as children spend 'more time in their rooms on social media'

'There are warning signs that shouldn't be ignored': Psychologist says 'busy lifestyles' mean parents and teachers can miss indications of a teen shooter - especially as children spend 'more time in their rooms on social media'
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