Law students: It would be a very useful student note to collect the post-Carpenter cases on whether the 4th Amendment recognizes a "mosaic theory" and what lines the various draw. Some post-Carpenter cases accept a mosaic theory, explicitly or implicitly; others reject it.

For example, the Mass SJC embraced the mosaic theory in McCarthy, a case about ALPRs: https://cases.justia.com/massachusetts/supreme-court/2020-sjc-12750.pdf?ts=1587124946

Meanwhile, the Wash SCT rejected the mosaic theory in Muhammad, a case on cell phone pings:
https://courts.wa.gov/opinions/pdf/960909.pdf

Super useful for a note to collect all the cases.

Just collecting the cases and showing what lines courts have drawn would be very useful, as courts will continue to split on this; showing the state of play right now would be useful to lawyers and courts alike. Context here: https://repository.law.umich.edu/mlr/vol111/iss3/1/