(1) Does U.S. v. Knights, 534 u.s.1 12,122 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 arid 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?

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