Does U.S. v. Knights and Griffin v. Wisconsin still precedent to be relied on?

QUESTIONS PRESENTED oe , (1) Does U.S. v. Knights, 534 u.s.1412,122 s. ct.587,151 L. ed. 2d. 497 (2001) and Griffin v. Wisconsin, 483 u.s. 868,873,107 s. ct. 3164, 971, ed. 2d. 709 (1987). Which were | used in Samson v. California, 547 u.s. 843,126 s. ct. 2193, 165. L. ed, 2d. 250(2006) still precedent to be relied on? _If yes, then under the totality of the circumstances does Mathews still have a reasonable expectation of privacy of his person ‘(under the Fourth Amendment),to not be subjected to GPS monitor, to search and investigate State and Federal crimes without a warrant or with no provision in a parole agreement? | (2) According _.to Colorado law, if a. contract/parole agreement doesn't state provisions allowing GPS monitoring to search/investigate for State and Federal crimes outside of probation/parole, without first having a warrant,.then is that a Fourth Amendment violation?