Joseph P. Waldholtz, the former husband of Rep. Enid Greene (R-Utah), has become a heroin addict and continued to bounce checks since he pleaded guilty in June to bank, election and tax fraud, according to papers filed in U.S. District Court.

According to a federal prosecutor who filed the papers, an FBI agent uncovered evidence not only of Waldholtz's heroin problem and check-kiting, but of forged prescriptions and one incident in which he took advantage of a good friend who loaned him her credit card believing he was going to use it to buy a birthday present for his daughter. Instead, he spent $550 on himself, the court papers said.

Waldholtz drew national attention to himself, his wife and their marriage when he suddenly disappeared late last year amid allegations of personal and political financial misdeeds. His wife quickly distanced herself from him, called on prosecutors to indict him and filed for and received a divorce.

Waldholtz, 33, is scheduled to explain himself this morning to U.S. District Judge Norma Holloway Johnson, who released Waldholtz on his own recognizance last June after he admitted to writing $250,000 in bad checks, lying to federal officials about the source of $1.8 million in his wife's election campaign and creating "ghost" contributors to the "Enid '94" effort.

As a result of his behavior in the past few months, prosecutors say they have lost confidence in Waldholtz, who had been cooperating with authorities as part of his guilty plea. Assistant U.S. Attorney Craig Iscoe is asking Johnson to revoke Waldholtz's bond and send him to prison pending his sentencing Oct. 23.

Waldholtz's lawyers declined to comment. But according to papers filed by the prosecutor, Waldholtz's lawyers said their client had checked into a drug treatment program at St. Francis Hospital in Pittsburgh last week.

Iscoe said he had not confirmed that and argued that it doesn't matter. "Mr. Waldholtz is able to leave the program at any time and should not be permitted to use a drug treatment program to protect himself from the consequences of violating the court-imposed conditions of release," the prosecutor wrote in the papers filed last week.

According to the new allegations, Waldholtz admitted to FBI agent Ansel E. Packer that he has been using heroin on a daily basis for several weeks. Packer also found that Waldholtz was allegedly preying on his family and friends.

In late August, Waldholtz allegedly stole a prescription pad from his father, a dentist, and used it to obtain Vicodin tablets. He also allegedly wrote checks to his parents for $24,600 on an account with insufficient funds. And besides his friend's credit card, he also is being accused of taking his father's Discover card to make $1,446 in purchases.

When Johnson accepted Waldholtz's guilty plea in June, she released him on his own recognizance. She gave him the standard warnings about not committing another crime or using drugs while on release. At the time, the judge told Waldholtz he could travel to and from Pittsburgh, Washington and Salt Lake City. But she refused to allow him to visit friends in various parts of the country as he had asked. CAPTION: JOSEPH P. WALDHOLTZ