In the last six months, an attorney's office at the Dillingham Transportation Building Downtown has lost more than $6,000 worth of office equipment and supplies following two burglaries, a theft and an assault, according to police and building occupants.

The office of Honolulu attorney William F. Sink, at 735 Bishop St., has been hit three times, most recently on Friday at 5:30 a.m., and office employees are worried the thief may have stolen a cache of clients' personal information that may make them vulnerable to identity theft.

A man dressed in "business attire" is seen on building security surveillance video from Friday, walking in and out of the building carrying various items. The man took a 50-pound mini-refrigerator, a 200-pound Xerox machine and what appeared to be a box of files.

"It's very unsettling, especially since we have all our client files in our office. Our clients' (personal) information could have been compromised," said Andrea Sink, who works as a certified paralegal assistant for her husband. "I'm trying to figure out who did this."

In addition to the items stolen during the thefts and burglaries, Andrea Sink said stamps, loose change and other office supplies have gone missing.

In June, Andrea Sink was slapped in the face and hit over the head with a clipboard by a man who walked in off the street claiming to be a client.

During the first burglary on Jan. 26, thieves made off with a laptop computer, two hand-carved wooden chairs and other office supplies from Sink's office. On May 22, a dentist's office in the building reported the loss of fruit bars, $5 in cash, two coffee makers and an undisclosed amount of coffee.

Stan Krasniewski, general manager for Pacific Guardian Center, which oversees 735 Bishop St., said thefts and burglaries are more common during the holidays and usually involve people walking into unoccupied offices during business hours and walking out with items.

He said the recent thefts and third-degree assault case are isolated and that thefts, assaults and burglaries are not common in the building, which is in the heart of the city's financial district.

Building security officials turned over a surveillance tape to police that shows the man walking in and out of the building carrying items starting at 5:30 a.m. Friday, Krasniewski said.

The man is seen "hanging around" the building and in one frame walks out of the building holding a cup of coffee.

"The three incidents, two of them having to do with Sink, it is kind of strange," said Krasniewski.

Police are investigating two burglaries in the building and urge occupants to report crimes.

"That's a big building with a lot of different offices, and these could be two isolated incidents for all we know," said police Capt. Frank Fujii. "Anyone who is the victim of crime should not only report it to your landlord but also call police because if there is a crime problem in your area but you don't report it, it is difficult for us to know about it."

Reach Peter Boylan at pboylan@honoluluadvertiser.com.