Federal prosecutors completed their case today against Maryland state Sen. Tommie Broadwater Jr., attempting to link $8,343 in cash seized at Broadwater's home with thousands of food stamps they say were illicitly obtained and laundered through his suburban Washington supermarket.

Broadwater, 41, is expected to testify in his own defense either late Tuesday or early Wednesday in federal court here.

Along with his daughter, Jacqueline, 21, and three Washington area men, he is charged with obtaining $70,000 in stolen food stamps at a "discount" from an undercover Secret Service agent last winter and redeeming a portion of them through Broadwater's Chapel Oaks Farmers Market on Sheriff Road in Prince George's County.

Today, Secret Service agent Daniel A. Piovosi testified that he and other agents seized $1,000 in cash from the master bedroom of Broadwater's Glenarden home and $7,343 from his daughter's room last March 6. Broadwater was arrested that day.

Piovosi said Jacqueline Broadwater was at home and "fully cooperated" in showing 15 to 20 places, including closets, drawers and shelves, where she kept the money.

Piovosi testified that when he asked her why she kept so much cash at home, she said she was "thinking of buying an automobile." Asked why she did not put the cash in a bank, she said that "she didn't believe in banks," Piovosi said.

Prosecutors have contended that the money is evidence that Broadwater cashed illicitly obtained food stamps. Defense attorney R. Kenneth Mundy has countered that only an "inferential" link exists between the stamps and the cash, and direct involvement by Broadwater is needed to prove the crime.

Broadwater is charged with receiving the stamps in four deliveries from defendant William Dudley, 49, of Landover, who in turn obtained them either directly from undercover Secret Service agent Norman James or through defendants Raymond (Big Jack) Quigley, 68, of Fairfax and his son, Raymond Quigley Jr., 49, of Clinton.

Prosecutors say most of the stamps were traced through the Federal Reserve Bank in Baltimore with Chapel Oaks Farmers Market endorsements on them.

Broadwater is expected to acknowledge contact with Dudley but to claim there was no criminal intent, according to Mundy.

In an important legal development, Judge Norman P. Ramsey today agreed to let defense attorney Fred Warren Bennett argue to the jury that his client, Dudley, was illegally entrapped in the undercover sale of the stamps. Prosecutors had fought to keep the entrapment defense out.