A miscarriage sometimes happens because there is a weakness of the cervix, called an incompetent cervix, which cannot hold the pregnancy. A miscarriage from an incompetent cervix usually occurs in the second trimester. There are usually few symptoms before a miscarriage caused by cervical insufficiency.
Police perjury (or testilying in United States police  slang) is the act of a police officer giving false testimony. It is typically used in a criminal trial to make the case against a defendant who the police believe to be guilty when irregularities during the suspect's arrest or search threaten to result in acquittal.
Perjury is basically lying under oath or on an official document. It is a Class A misdemeanor under normal circumstances. It is elevated to a Class E felony if committed on an application for a handgun carry permit or on a sexual offender registration form. Perjury can be aggravated under certain circumstances.