- The cited SCOTUS precedent is almost 100 years old, and seems to be the only existing one of its kind. SCOTUS has reversed itself in the past when things and conditions have changed over a long period of time, and on those counts, the Adair case is a good candidate for reversal. If there are more similar cases, this argument for reversal is weaker.
- The 4th amendment only covers seizure for criminal investigation purposes if you take a strict constructionist view of it. The SCOTUS has interpreted it to grant a wider right to privacy than a constructionist reading would, and iirc there are more than one case where precedent is established. This was not the case when the previous precedent (the Adair case) was established, so this argument would have to be taken into account on that merit.
- The 9th doesn't grant any specific rights, it is a very farsighted catch-all clause that is meant to prevent abuses that could rise out of a strict constructionist reading of the USC, and in this instance it would most certainly be relevant as a supporting point for other arguments (and it might lend itself to being the core of another set of separate arguments).
Edi