MINNEAPOLIS (AP) - A Minnesota woman has been sentenced to seven years in prison for suffocating her 3-month-old son in 2009 and trying to do the same to her infant daughter in 2012.

Twenty-six-year-old Ashleigh Casey pleaded guilty to second-degree murder and assault in March.  Prosecutors had asked for 12 years, the punishment recommended by state sentencing guidelines.

Hennepin County Judge Fred Karasov says he decided on a sentencing departure because Casey was remorseful and had been successful in therapy.

Casey declined to speak during Tuesday's hearing.

Casey also tried to suffocate her infant daughter while the baby was a patient at the University of Minnesota Hospital. That led to authorities reopening the case of her son's death and charging her with murder last year.

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