Because Texas Health and Safety Code says the quarantined individuals are entitled to privacy and security while being monitored.
Sec. 81.206. GENERAL RIGHTS RELATING TO TREATMENT. A person receiving health services under this subchapter has the right to:
(1) appropriate treatment for the person's illness in an appropriate setting consistent with the protection of the person and the community;
(2) not receive unnecessary or excessive medication;
(3) refuse to participate in a research program; and
(4) a humane treatment environment that provides reasonable protection from harm and appropriate privacy for personal needs.
Apparently the girlfriend and her kids didn’t believe in the on your honor quarantine...and now the cops are keeping them contained.