Answer:
The answer to the question: In the U.S Constitution the fugitive slave clause kept the condition of bondage for a slave even if he or she escaped to a free state?, is, yes, the Fugitive Slave Law provided that if an escaped slave was found, be it in a free state, or anywhere else, he or she must be returned to their owner.
This clause made part of the Articles of Confederation of the U.S Constitution, and represented most of its Article IV, Section 2, clause 3. It also became a point of conflict during and after the Civil War, as it irked abolitionists who opposed such a law. It was finally repealed when the Thirteenth Amendment was passed. However, it is also important to know that most northern states refused from the outset of the law, during the Civil War, to enforce it.