FOIA requests are not applicable to the Capitol Police. That's wrong. In Floyd and other recent cases, the police officers' names were released in two days. While I don't expect that, there should be some investigation reports made public after all this time.
The Capitol Police is exempt from the Freedom of Information Act (FOIA), a law that requires federal agencies to disclose a large amount of information to the public. That leaves reports by the department’s inspector general that probe allegations of wrongdoing shielded from the public.
Other federal law enforcement agencies, including the FBI, Bureau of Alcohol, Tobacco, Firearms and Explosives, and Drug Enforcement Administration are subject to FOIA laws.
Local police departments also are required under their state’s sunshine laws to disclose information to the public.
https://www.washingtontimes.com/news/2021/mar/15/ashli-babbitt-capitol-riot-shooting-death-shrouded/
If the Capitol Police are not subject to an FOIA request, you could still write them.
The DOJ was conducting a separate review to determine if the deceased woman's civil right were violated. Perhaps you could get a copy of their report by writing for it or filing an FOIA.
One thing I noted in the article was that the incident was still under investigation as of two days ago.
"He declined to comment on whether the officer’s name will be released, saying the investigation remains active."
According to the article, the current status is this:
"On Monday, a spokesman for the District’s Metropolitan Police Department, which is overseeing the investigation, denied that a final decision had been made on criminal charges."
“The United States Attorney’s Office has not determined if charges will/will not be filed,” spokesman Dustin Sternbeck said in a statement to The Washington Times."
If you think the law needs to be changed to provide more information more quickly, I'd suggest you get in touch with Senator Ron Johnson. From what I've read, he seems to be the most active one about investigating the Capitol riot, and he is a Trump supporter.
There are a lot of things you could be doing besides complaining about it on the LuLa Coffee Corner.