(CNN) "This is unbelievable," said Doyle Miller, moments after entering the apartment he owns and rented out to the couple behind this week's San Bernardino massacre . "Unbelievable."

Miller was referring to the mess inside the two-floor Redlands, California, townhouse, where Syed Rizwan Farook lived with his wife Tashfeen Malik , their 6-month-old daughter and his mother.

But he could just as well have been talking about the mob of reporters who crowded its rooms, hallways and stairway on Friday, jostling each other for position.

Like them, Miller was seeing the inside for the first time since Wednesday's mass shooting at a San Bernardino regional center left 14 dead and 21 wounded -- a nightmare that ended when police shot and killed the married couple after first spotting them in a rented black SUV near the Redlands residence.

"Most of the stuff that's in here is probably caused by the FBI and the police department," the landlord told CNN. "...I need to assess the damage. It's a lot worse than what I thought."

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The apartment contained many things that you'd expect in any other apartment, from couches to clothes, from a refrigerator to drawers. There were also distinctive touches, like a clock that looks like a giant watch pinned to a wall, a tapestry with Arabic writing and a copy of the Quran.

Not to mention the suggestions that authorities had been here, from piles of items to shattered glass to boarded-up windows. The most tell-tale example may have been documents from the FBI showing lists of items taken from the home.

The scene was made all the more surreal given how, interspersed amid the clutter, was a little rocker, an ExerSaucer, a crib and other evidence that this home very recently was occupied not only by two killers, but a baby.

Some online and elsewhere shuddered at the idea of reporters prowling around a place that, by authorities' own admission, not long ago contained ammunition, pipe bombs and other evidence. CNN law enforcement analyst Harry Houck, a retired New York police detective, said he was "having chills down my spine" looking at the throngs walk around an apartment he felt was "clearly ... full of evidence."

But FBI spokeswoman Lourdes Arocho told CNN, "The search is over at that location."

Late Friday, a UPS driver noticed that a package being delivered was addressed to Farook's townhouse and turned around to return it to a distribution facility, said San Bernardino Police Chief Jarrod Burguan. The package was held in isolation, and the sheriff's office deployed bomb technicians to inspect the package out of an abundance of caution.

The shooting took place late Wednesday morning, though it wasn't until late that night that Miller realized -- after seeing it on television -- its connection to his Redlands property. Friday was the first time he'd been inside since he'd refurbished the apartment before Farook and Malik moved in in mid-May.

He got word Thursday night that authorities were done with their work there and that he, and apparently whomever else he allowed, could go inside.

"My reaction right now is it's not real," Miller said. "It's unreal."