Christian K. Lee, File, Associated Press
FILE - In this June 9, 2015, file photo, former U.S. House Speaker Dennis Hastert departs the federal courthouse in Chicago. A man who alleges he was sexually abused by Hastert decades ago and was later promised $3.5 million to stay quiet has filed a federal lawsuit saying he's only been paid about half the money.

CHICAGO — A man who alleges he was sexually abused by former U.S. House Speaker Dennis Hastert decades ago and was later promised $3.5 million to stay quiet has filed a lawsuit saying he's only been paid about half the money.

The person known as "Individual A" in court documents filed the lawsuit Monday in Yorkville, the northern Illinois city where Hastert allegedly abused several boys while he was a wrestling coach at Yorkville High School.

In the lawsuit, "Individual A" says he's owed $1.8 million under the agreement. He says he's suffered panic attacks that led to bouts of depression, hospitalization and unemployment.

Hastert is scheduled to be sentenced Wednesday in federal court in Chicago on charges of breaking federal banking rules in a scheme to cover up sexual abuse.