Deborah Denison was supposed to be bringing them home , police say . Instead , police believe she killed them and then herself . ` ` She sounded fine , '' the boys ' mom told TV News . ( CNN ) -- It should have been little Alton 's big day . The grandmother had a history of mental illness , CNN affiliate WFSB - TV says .
Deborah Denison was supposed to be bringing them home , police say . Instead , police believe she killed them and then herself . ` ` She sounded fine , '' the boys ' mom told TV News . The grandmother had a history of mental illness , CNN affiliate WFSB - TV says .