A babysitter who admitted killing a two-month-old baby by shaking him is facing 18 years in federal prison.
Sheilla Linares, 22, confessed to killing tiny Thomas Castellon II while she was supposed to be looking after him.
She grabbed Thomas and shook him after he started being 'fussy' while she was trying to work and do the laundry while looking after him in December 2013.

Death by shaking: Thomas Castellon II was killed when he was just two months old after babysitter Sheila Linares shook him
Linares said she shook Thomas for 'less than a second' before realizing she was hurting him - but by then the damage had been done.
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Share 52 sharesThe child was rushed to hospital and, and was kept alive by doctors for four days, but eventually died from blunt force injuries to his head and neck, the Clarksville Leaf-Chronicle reported.
An autopsy revealed Thomas had a brain hemorrhage, damage to his spinal cord and bruising around his arms and neck.

Parents: Thomas and Hormisda Castellon, pictured above, were away when their son was killed
Linares was babysitting Thomas at a home on the Fort Campbell military base in Kentucky. She was also caring for Thomas's sister and her own two young children.
Thomas's mother Hormisda and his father Thomas, a soldier, were away at the time.
Linares was tried in federal court because the killing took place on a military base.
She agreed to a plea deal which has seen her agree to a sentence of 18 years in prison, with no chance of parole, and a $250,000 fine.
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