I feel for you. I've had problems with TSA, in the past. Nothing like you've had though. Below, is an excerpt from a gov't site and at the bottom, I've included the link for TSA forms. Hope this helps.
Pilfered/Damaged Bags -- In addition to playing a role in some baggage delays, security screening can also contribute to damaged or pilfered baggage. Claims allegedly resulting from incidents that occur at a passenger screening checkpoint (about 15 percent of all claims received by TSA) are handled exclusively by TSA. However, claims related to checked baggage (about 85 percent of claims received by TSA) could be the fault of either TSA, the air carrier, or other third parties. Therefore, a passenger whose checked baggage has been damaged or pilfered must file two claims, one with TSA and one with the airline. Claims filed with TSA are resolved in accordance with the Federal Tort Claims Act (FTCA), while claims filed with an air carrier are resolved in accordance with that carrier's "Contract of Carriage."
When TSA receives a claim, it is assigned to a claims examiner. The examiner does all the research and makes a recommendation on the claim. Then a TSA Delegated Authority Official reviews the claim and the research provided and either approves or denies the claim.
It is often difficult to tell whether TSA or the airline is to blame for damaged or stolen items. If TSA is unable to determine whether TSA or the airline is at fault, TSA usually pays half of the amount claimed. TSA pays some amount of compensation on approximately 47 percent of claims received. In FY 2005, TSA paid $2.3 million to settle claims.
If the preponderance of the evidence shows that the airline or the passenger was at fault, TSA denies the claim. Under the FTCA, there is a redress procedure under which the passenger can request reconsideration of a denied claim. Approximately 30 percent of denied claims request reconsideration. When that happens, the claim goes to a different Delegated Authority Official at TSA for review and reconsideration.
The number of claims filed with TSA has declined. From 2002 through 2005, approximately 2,000 baggage claims were filed each month. Currently, about 1,700 baggage claims are filed per month. TSA attributes this in part to better education of travelers about not packing valuable or fragile items in checked baggage.
TSA Form