Preview: A visit to Lee Harvey Oswald's room

(CBS News) On November 22, 1963, Lee Harvey Oswald reportedly showed up at the Dallas boarding house where he was renting a room, wordlessly grabbed a few things, and walked out the front door, and into history.

In 1964 CBS News visited the boarding house owned by Gladys Johnson at 1026 North Beckley, in the Dallas neighborhood of Oak Cliff, and documented the five-by-14-foot room where the accused assassin of President John F. Kennedy had lived. But in reaction to the hate mail and death threats that seemed to implicate her, Johnson closed her door to interviewers.

Now, nearly 50 years later, this piece of historic real estate is going on the market, and CBS' "Sunday Morning" has became the first TV news broadcast to be allowed back into the house that was the last home of one of the 20th century's most infamous figures.

Correspondent Tracy Smith visited the house, and found a place strangely frozen in time -- with the same bed, and many of the same fixtures, as when Oswald himself was a resident.

Except, it seems, for the bed linens.

Johnson's granddaughter, Patricia Ann Puckett-Hall, told Smith her grandmother was a bit rankled, to her dying day, by the fact that law enforcement officials ransacked her home following Oswald's arrest, confiscating even his bed sheets, which were never returned. "Not because they were historic, not because she had wanted to save them, but because those were fairly new sheets and she could have used those on other beds," Hall said.

Don't miss Smith's story offering a unique doorway into history on "Sunday Morning," to be broadcast Sunday, July 21 on CBS.

"Sunday Morning" is this year's Daytime Emmy Award-winner for Outstanding Morning Program. Rand Morrison is the executive producer.