The correct answer to this open question is the following.
Unfortunately, you did not attach the list. Without the list, we do not know the reference to support the notion of the Declaration as a lawyer's brief.
However, in order to help you, we can answer in the following general terms.
The Declaration of US Independence can be compared to a lawyer's brief, which is an outline of the claims and the evidence the lawyer will present in a case.
We can set the example of the following lines of the Declaration: <em>"The history of the present King of Great Britain is a history of repeated injuries and usurpations, all having in direct object the establishment of an absolute Tyranny over these States. To prove this, let Facts be submitted to a candid world. He has refused his Assent to Laws, the most wholesome and necessary for the public good. He has forbidden his Governors to pass Laws of immediate and pressing importance.."</em>
In this portion of the Declaration, we can see how a lawyer could have stated the reasons why the King of England was oppressing the 12 American colonists
The Declaration of Independence was promulgated on July 4, 1776, and was immediately adopted by the Continental Congress. It was drafted by Thomas Jefferson, with the help of John Adams, Robert Livingstone, Benjamin Franklin, and Roger Sherman.