The parents of an infant killed last year by his nanny are suing the nanny and her former employers.

The lawsuit by Christopher and Ashley Bell says the child care facilities where Sarah Cullen had worked failed to report allegations that she had been abusive to children in her care before.

The lawsuit names as defendants Cullen, Grow With Me child care and its former director Jennifer Schmaderer; La Petite Academy child care and its former director Lisa Hampson; and online family care service Care.com.

Cullen was sentenced earlier this month to 70 years to life in prison for causing the injuries in February 2013 that killed 4-month-old Cash Bell.

The Bells are seeking an unspecified amount in damages.