The families of two young women are in shock after a tragic case of mistaken identity.

Six days after a fatal car accident, one family learned their daughter was still alive while another family realized they were holding a bedside vigil over the wrong girl.

The family of Abby Guerra spent the last week mourning their daughter, even holding a car wash to raise money for her funeral expenses.

Authorities told the Guerra family that Abby was killed at the scene of a car accident, but this past Saturday they learned there was a mix-up.

Abby was alive and in critical condition at the local hospital, while the family of another passenger, Marlena Cantu, was standing over Abby's bedside thinking Abby was their daughter.

In a tragic mix-up, it turns out that it was in fact Marlena, not Abby, who died at the scene.