SHELTON, Conn. (AP) - Police say an Ansonia woman charged in the death of her 6-year-old daughter had drugs in her system when she was involved in the fatal August 2015 crash in Shelton.

The Connecticut Post reports 37-year-old Joan Willoughby was charged with negligent homicide and other offenses last month following a nearly year-long investigation into the death of her daughter Nyah Marcano.

Police say Willoughby rear-ended a truck stopped for construction along state Route 8 at a high rate of speed, sending her sport utility vehicle off the highway into the grass median. Marcano was ejected from the SUV and died at the scene.

Willoughby's arrest affidavit says testing showed the narcotics morphine, oxycodone, oxymorphone and methadone were present in her system at the time.

Attempts to reach Willoughby were unsuccessful.