The new record holders wait until after statutes of limitations have elapsed in the various jurisdictions they traveled through.

Is there really no cooperation in enforcement at interstate level? I thought the police cars stopping at the state line was an 80s movie trope.

Also, the way I understand the statute of limitations in the US is that the time limit only applies to getting the charged filed. If the person is known (like in this case) they could be charged right now.

Each state is its own sovereign, state officials in one state is not recognized as such in another state (it doesn't mean they can't work together, they can be deputized or whatever the state laws say about another state officials, it just means by default, they can't be involved in another state's affairs and if they do, they'd be breaking the laws themselves even with good intentions).

Only the federal government can be involved in the interstate affairs but the constitution itself does not allow the federal government to be involved in police matters, only the states.

In addition, if someone breaks the law and cross the state line, the federal agencies can only be involved if the crime was being committed at the federal level. If no federal law exists, then there's nothing they can do.

Status of limitations is different in each state, it's not federal level. So, in some state, it can be from when the crime was committed. You can get the details here: https://www.lawinfo.com/resources/criminal-defense/criminal-...