All of the photos on that link you posted have been debunked, all are fakes.
Let me walk you through it from my field experience...
East Garrison is the oldest part of Fort Ord, California. The Army used the area as a bivouac area for the 76th FA to shoot Howitzers from before WWI until Camp Ord became Fort Ord in 1940. The area saw construction to house the men of the WPA who would build the original base over near Highway 1. Later it was home for ROTC students and later German POW's.
This building began life as a storage depot:
Nobody died in this building to my knowledge. From 2000 until 2006 I entered over 300 abandoned buildings on the base in search of murals to photograph before the structures were demolished. I wasn't there to hunt ghosts at first but the abandoned base became the perfect laboratory to develop a neutral base of knowledge. Out of those 300 buildings I would only have strange occurrences in a handful.
This building had no explainable activity nor did it have a "vibe" or give off any uncomfortable feelings (other than having to be careful where I stepped as to not go through the floor). The weird this was that this building was the only one where I got anomalous photographs.
Here are two:
This one was taken on 35mm film with a disposable camera (take note of this detail) as I was simply burning through the last exposures so I could drop it off at the drug store for processing. I didn't see the streak of light when I took the picture but it is definitely on the negative.
This one was taken about 2 years later, again with a disposable 35mm.
Were I a less than ethical ghost hunter I would play these up as ghost photos. This building was the only location on the entire base where I got these unusual pictures. East Garrison has a reputation for being haunted which dates back to the 1970's while the base was operational. The building sits next to the site where the first death at Fort Ord occurred in 1941. Before the Army bought the land East Garrison was home to the Whitcher family (great name, right?) who lost six children to the Spanish Flu at the turn of the century. They are still buried there.
I could play all of that up into marketable woo if I wanted to...
...but I didn't. I kept working the problem. Over the years I took around sixty pictures inside of that building and I only got three. I took around two hundred and fifty pictures around the base using the disposable Kodak 35mm cameras and got nothing unusual even in the weird buildings. Eventually I figured it out.
That second photo was just bad film. It happens.
The streak of light in the first photo is a result of a cheap camera and cheap-but-high tech flash wherein the sequence is designed to remove red-eye. If I had a good camera I would have got a full orb caused by the misalignment or mis-timing of the flash and shutter.
The last time I went into the building I had my Canon DSLR and took 70 pictures and got noting but high resolution photos of an empty building.
As far as I'm concerned even if ghosts are real they don't show up on camera.