A pregnant Washington woman has been found dead in a ravine after going missing several weeks ago on the way to her first sonogram. Now, her ex-boyfriend has been arrested and charged with her murder. Kassandra Cantrell, 33, was at the tail end of her first trimester when she made the appointment and was especially curious to see if the sonogram showed twins. She was a twin herself and they run in her family. When she didn't show up at the doctor’s office, her mom began to worry and called police.