"preparing evidence" is correct and usable in written English.
You can use it when you are referring to the process of gathering pieces of data or information to support an argument or position. For example, "The attorney was tasked with preparing evidence to demonstrate the defendant's innocence."
Some of the team became caught up in the lengthy, and personally destabilising, matter of preparing evidence for the quasi-judicial process of the Pollard inquiry.
Participating police captains reported an increased awareness of drug smuggling tactics, best practices in seizing and preparing evidence, and how to identify drugs using field test kits.
The CWU has claimed that the move breaches employment law and is preparing evidence before making a legal challenge in the next few days.
That step was taken in an effort to bypass Cuyahoga County Prosecutor Timothy McGinty, who is preparing evidence to present to a grand jury.
Mr. Buggins said he was also surprised to find, in preparing evidence for his lawsuit last fall, that some of the "antiques" he had manufactured were posted, along with fictional descriptions, on Mr. Hobbs's Web site (www.johnhobbs.co.uk).johnhobbs.co.uk
Administration officials took care today to note that the White House was not preparing evidence on Mr. Bin Laden to satisfy the demand for it from the Taliban rulers of Afghanistan.
Currently there is a limited practice of preparing evidence-based pharmaceutical policies.
This article presents arguments for preparing evidence-based pharmaceutical policies, and broad recommendations on how to convert them into effective mechanisms to improve access to medicines and contain pharmaceutical costs.
The Connecticut state police laboratory is one of only a few labs in the country that will do work and prepare evidence reports for public defenders.
He had taken money to prepare evidence for solicitors who hoped to bring cases against vaccine manufacturers, alleging MMR triggered autism in children.
At the State Department, the office of the ambassador at large for war crimes, David Scheffer, has been watching the forced relocations as officials prepare evidence for a possible war crimes indictment of President Hussein.
