NEW YORK (Court TV) — A homeless man was surprised to learn Monday that he was listed as the head of a Florida off-shore firm that an alleged mother-son grifter team set up in their plot to steal a missing millionaire widow's townhouse.

Robert McCarren was homeless and living in a Las Vegas shelter when Sante and Kenneth Kimes employed him as their servant in November 1996. Manhattan prosecutors called him to the stand Monday as they continued their attempts to prove that the Kimeses plotted to steal Irene Silverman's townhouse.

Sante and Kenneth Kimes are on trial for second-degree murder and kidnapping in Silverman's presumed 1998 death. Police have never found Silverman's body. The former ballerina has been missing since July 5, 1998. There was no sign of a struggle in Silverman's mansion and no evidence of Silverman's or the Kimeses' blood in the house. Prosecutors have speculated that the Kimeses smothered Silverman, stashed her body in a stolen Lincoln towncar and dumped her in an undisclosed location.

Prosecutors believe the Kimeses monitored Silverman's business transactions for months before Kenneth, using the name "Manny Guerrin", approached Silverman in June 1998 and began renting an apartment in her townhouse.

McCarren was surprised when Assistant District Attorney Ann Donnelly told him that he was the managing director of the Atlantis Group Ltd., a firm prosecutors believe was a shell corporation set up by Sante Kimes. According to the prosecution, the Kimeses forged a deed that approved the transfer of Silverman's $10 million Manhattan townhouse to the Florida firm for $395,000. McCarren also did not know that his name was attached to three six-figure Well Fargo Bank accounts.

Under direct examination by prosecutors, McCarren claimed his wallet containing his Social Security card vanished while he was employed by the Kimeses. He told jurors the wallet disappeared one day while he was showering. McCarren also remembered seeing Sante Kimes rifling through his personal papers one time.

McCarren's papers were among the items found on the Kimeses when they were arrested in front of a New York Hilton on July 5, 1998 — the day of Silverman's disappearance. The Kimeses were arrested on a warrant from Utah, where they were accused of using a bad check for $14,900 to buy a Lincoln Town Car. Investigators also found Silverman's keys on Kenneth Kimes, cassettes of Mrs. Silverman's telephone conversations, apparently taken from wiretaps, the forged deed, loaded .9 mm and .22 caliber pistols, several wigs and masks, plastic handcuffs, $30,000 in cash, an empty stun gun box and a pink liquid substance similar to a known "date rape" drug.

In addition to murder and kidnapping, the Kimeses also face conspiracy, robbery and forgery charges. They have denied any involvement in Irene Silverman's disappearance and their lawyers say that prosecutors cannot even decisively prove that Silverman is dead.