WAVERLY, Neb. (AP) — A Waverly mother accused of being drunk and rolling onto her infant son, smothering him, has pleaded not guilty to a felony child abuse charge.

The Lincoln Journal Star reports that an attorney for 35-year-old Ashley Bean issued a statement Wednesday criticizing the sheriff’s investigation into the baby’s death. He says a thorough medical examination would have shown the boy died from sudden infant death syndrome, or SIDS.

Investigators say Bean was highly intoxicated Dec. 17 when she fell asleep in the bed with her son, Axel Xavier Arizola, causing his death.

Court documents say Bean’s blood-alcohol content was measured at 0.19 percent, more than twice the legal limit to drive, two hours after deputies were called to the home.