Shoes with no laces?

In a recent tweet, a former Democratic ethics adviser had some less than flattering comments for the current president (as is the norm in Washington.) When discussing the investigation, he said,

Kushner, Donnie Jr. and the rest of the Trump crime family better keep their overnight bags handy. Pack shoes with no laces guys.

What does it mean to pack shoes with no laces, and what is the implication here? It must be some colloquial phrase, but exactly what it implies I don't understand.

Solution 1:

The quote mentions :

the 'Trump crime family'.

[I am quoting, not agreeing or commenting.]

When one is placed in a holding cell, one's laces are removed from one's shoes. This is to prevent suicide. Persons unused to cell conditions can easily fall prey to depression.

So 'pack shoes with no laces' means 'you're going to jail'.

Sergeant Carville said when he joined the force 17 years ago it was the practice to remove a prisoner's laces but over a period of time this was changed to the discretion of duty officers in some stations.

"It was felt removing shoes and laces affected the dignity of the prisoner, but they were taken away if it was thought the person might use them to endanger themselves," he said.

Herald Scotland