A man will serve 30 days in jail for threatening to kill his pregnant girlfriend and then leading lawmen on a high-speed chase.The defendant, Thomas Cole Young, 29, entered guilty pleas before Circuit Court Judge Bart Stanley to charges of domestic assault, aggravated criminal trespassing and evading arrest. He was directed to serve one month of a two-year sentence. He will also be required to get an alcohol and drug assessment as well as a mental evaluation and must enter the batterer intervention program.