Chong's attorney, Eugene Iredale, said he will announce "an important development" Tuesday, little more than a year after filing a $20 million claim against the federal government. He declined to elaborate.
A DEA spokesman, Rusty Payne, referred questions Monday to the Justice Department, which handled settlement negotiations. A call to the Justice Department's public affairs office was not returned.
Chong, who was attending University of California, San Diego, was at a friend's house in April 2012 when a DEA raid netted 18,000 ecstasy pills, other drugs and weapons. Chong and eight others were taken into custody.
Agents told Chong he would not be charged and had him wait in the 5-by-10-foot cell at DEA offices in San Diego. The door did not reopen for four days, when agents found him severely dehydrated and covered in his own feces.
Chong said he began to hallucinate on the third day. He urinated on a metal bench to drink his urine. He stacked a blanket, his pants and shoes on the bench and tried to reach an overhead fire sprinkler, futilely swatting at it with his cuffed hands to set it off.
Chong said last year that he gave up and accepted death. He bit into his eyeglasses to break them. He said he used a shard of glass to carve "Sorry Mom" onto his arm so he could leave something for her. He managed to finish an "S."
Chong was hospitalized five days for dehydration, kidney failure, cramps and a perforated esophagus. He lost 15 pounds.
The DEA issued a rare public apology at the time.
Copyright 2013 The Associated Press.