Goofs

When questioning The Lawyer, he is cable tied to the chair by Dolores. However when the chair falls over, you can clearly see some kind of strap tying his arm to the chair, rather than the cable tie.

When The Killer has Dolores as hostage in the car outside her house, she screams. The Killer wasn't around to hear the scream but he heard it echo in his head towards the end of the movie when his victims' words are echoing in his head.

The pistol the Killer uses to shoot his victims does not have a suppressor attached, it is a muzzle brake, which would not silence the gunshots.

The driver licenses shown in the movie have U.S. format, Dominican licenses do not show zip code also they have "DR" like Dominican Republic, when it should have been 'RD', for Spanish "República Dominicana".

While interrogating the Lawyer with a Paslode nail gun, the battery that is needed to light the gas and fire the nails is not inserted.

The Killer goes to an Ace Hardware and purchases "Ryobi" brand power tools. Ryobi has been an exclusive partner of The Home Depot since 2000, and so it would not be available at an Ace Hardware store.

The killer is able to travel internationally with different passports yet no bio-metrics checked in the USA or Shengen zone Europe.

When the Killer closes his account at a bank, the bank document (twice) has the misspelling: "WITHDRAWL".

In minute 39:20 in the background, a plane is visible while taking off. Its trajectory is not straight, revealing a wrong CGI tracking of the fake plane.

When The Killer is paying at EPS for sending the document to Dolores, he does so with a BANCREDITO card, this back had stopped operating by the time the movie was made, it went bankrupt in 2003.

When on the train to New York City the train side clearly says "Metra". Metra is exclusive to the Chicago suburban district.

At 1:08:24 The Killer purchases a 40 ounce bottle of Old English 800 malt liquor at a Breaux Mart store that is supposed to be in St. Petersburg, FL. Breaux Mart Stores are not located in Florida. The killer's car GPS shows him actually traveling on Highway 90 east of New Orleans, Louisiana. Also, in the state of Florida malt liquor may only be sold at maximum 32 ounces.

The Killer is seen renting a car at an Enterprise dealership in New York, while a passenger train with the Metra logo passes outside in the background. Metra serves only the Chicago metropolitan area.

The killer takes a flight from Santo Domingo in the Dominican Republic to New Orleans. However, his ticket shows his destination as BRX, which is the airport code for Barahona, also in the Dominican Republic.

The restaurant scene where The Killer meets The Expert, while set in New York, actually was filmed in downtown St. Charles, Illinois (about an hour out of west Chicago), with iconic touristic Main Street bridge over Fox River, Hotel Baker, and its restaurant "The Waterfront" featured in the sequence. The location giveaways are the theater "Arcada", and ice cream shop "Smitty's" that appear briefly while the killer is tailing The Expert in the city.

Leo the taxi driver refers to the blonde girl as "guera" this is a Mexican term; Dominicans don't use it, they use "rubia" instead.

The Killer, who strives to "avoid being memorable", is tempting fate by using TV character names as aliases.

The killer leaves his car poorly parked with the door wide open at the Dominican hospital, which would attract police attention or get stolen, despite his being obsessively meticulous about covering his tracks.

When approaching the safe house, the Killer retrieves a pistol from his glove box and racks the slide to chamber a round.

Before entering the house, he does it again, which is now unnecessary and would eject the perfectly good round he just loaded.

The Killer is seen in the restaurant by two or three of waiters and then he executes a wealthy, knife-wielding lady in a public space. This would be front page news and goes against Killer's entire philosophy.