NEW YORK (Court TV) — According to a frauds investigator, the Social Security card Sante Kimes allegedly used in her attempt to get the forged deed to a missing millionaire's mansion notarized bore the number given to a infant two years ago. A notary who approved an allegedly forged deed to a missing New York millionaire's townhouse testified that Sante Kimes posed as Irene Silverman shortly before the 82-year-old's disappearance.

New York prosecutors are trying to prove that Sante Kimes and her son Kenneth plotted to steal Silverman's $5 million townhouse. The mother-son defendants are on trial for second-degree murder and kidnapping in the presumed 1998 death of Silverman. The former ballerina has been missing since July 5, 1998. However, police have never found Silverman's body and the state is armed with only circumstantial evidence. In addition to murder and kidnapping, the Kimeses also face conspiracy, robbery and forgery charges.

The prosecution believes Sante Kimes tried to use a fake Social Security card to pose as Silverman to get the forged deed notarized. Alan Murphy, a frauds investigator for the Social Security Administration, testified Monday that the Social Security number on the card was assigned to a baby named Joanne Woodman when she was born in 1998. Last week, Noel Sweeney, a notary, identified Sante Kimes as the woman who posed as Silverman. Sweeney said Kimes presented him with a deed that approved the transfer of Silverman's $4 million Manhattan townhouse to the Kimeses for a fraction of its value.

Sweeney told jurors that Sante appeared to sign the documents she later notarized. However, Sweeney admitted she did not actually see Sante sign the deed; she did not watch Sante's every move and did not see the pen touch the paper. Sweeney also said she did not inspect the documents before Mrs. Kimes appeared to sign them and did not ask for a picture identification card from her. She accepted the Social Security card as sufficient ID. The fake Social Security card was among the items found on the Kimeses when they were arrested July 5, 1998 — the day of Silverman's disappearance was first reported. 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.

At the time of the arrest, 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.