Lance corporal due to give birth at any time , mother says . Marine 's car found Monday at bus station . Mother reports Marine missing on December 31 . Note : Marine was to testify about incident at school , according to mother .
Lance corporal due to give birth at any time , sheriff says . Marine 's car found Monday at bus station . Mother reported Marine missing on December 19 . Sheriff : Marine was to testify about incident at base , according to mother .