Mother of missing pregnant postal worker pleads for answers 1 year later: ‘If you know something, say something'

The mother of a U.S. postal worker who disappeared a year ago while pregnant is begging for answers.

“If you know something, say something,” Karen Phillips, mother of Kierra Coles, told ABC News. “Come forward and say something to end this nightmare.”

Coles, 27 years old as of last week, was last...