CAMARILLO, Calif. (AP) -- A Ventura County sheriff's sergeant says DNA evidence has led to the arrest of a woman believed to be the mother of a dead newborn found in a Camarillo strawberry field.

Sgt. Ian Laughlin said Thursday that 20-year-old Rosalba Cruz Moran was arrested last week on suspicion of murder.

A field worker at La Esperanza Farms found the newborn's body on May 21.

Detectives collected more than 100 DNA samples from field workers in the area that day.

Forensic scientists identified one donor as a close relative of the newborn's mother.

Laughlin says Moran was identified as the possible mother, DNA was collected from her and it confirmed that she was the dead baby's mother.

She is being held on $1 million bail.

It's unknown who the father is.

Copyright 2012 The AP.