NEW YORK -- The laid off clothing designer who shot his former colleague to death outside the Empire State Building last week told his landlord he was leaving – and not returning, police said Thursday.

Jeffrey Johnson left his keys and said he wouldn't be back after Friday, the day his former co-worker Steven Ercolino was fatally shot. Police shot and killed Johnson when he pointed a gun at them after killing Ercolino and slipping into the busy rush hour crowd on Fifth Avenue. Nine bystanders were wounded by police gunfire, ricochets and fragments. They suffered non-life-threatening gunshot and graze wounds.

Johnson's landlord wanted him out of his Upper East Side apartment temporarily to do work, and Kelly said Johnson had told him that "things would be taken care of" by Friday.

Investigators searched his apartment and went through his computer, but it was not clear why he chose that day. Johnson had been laid off more than a year ago from the import company Hazan where he worked with Ercolino, who was a vice president for sales. Police said Johnson blamed Ercolino for his job loss because he didn't properly promote Johnson's line of women's T-shirts. The animus grew between them to include harassment complaints to police, authorities said.

Wearing a business suit and carrying an attache bag, Johnson waited for Eroclino outside the office near the Empire State Building and at 9:03 a.m. opened fire, then slipped the gun into his bag and calmly walked up the street, police said. Two construction workers who witnessed the shooting followed him and notified the two officers stationed outside the skyscraper as part of the department's counterterrorism efforts since the Sept. 11 terrorist attacks. Video shows Johnson turning, facing the officers and raising his weapon as they open fire.

Kelly said the department is doing an exhaustive review of the shooting, which is standard practice for any police-involved shooting. He and Mayor Michael Bloomberg have said they believe the officers followed proper protocol.

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  • Police Commissioner Raymond Kelly speaks near the Empire State Building following a shooting, Friday, Aug. 24, 2012, in New York. New York City Mayor Michael Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. Police say a recently laid-off worker shot a former colleague to death near the iconic skyscraper and then randomly opened fired on people nearby before firing on police. (AP Photo/ Louis Lanzano)

  • This photo posted to an Instagram account belonging to a person identified as paulnshapiro, an eyewitness at the scene, shows a victim of a shooting, with police standing by, outside the Empire State Building in New York, Friday, Aug. 24, 2012. The identity or condition of the victim was not immediately known. A disgruntled laid-off women's accessories designer shot a former co-worker to death in front of the Empire State Building, causing a chaotic showdown with police in front of one of the world's best-known landmarks. Police killed the suspect and at least nine others were wounded, some possibly by police gunfire, city officials said. The shooting happened at about 9 a.m. Friday at 34th Street and Fifth Avenue. (AP Photo/paulnshapiro via Instagram)

  • An official inspects evidence near the Empire State Building in New York following a shooting Friday, Aug. 24, 2012. Police say a recently laid-off worker shot a former colleague to death near the iconic skyscraper, then randomly opened fire on people nearby before firing on police. New York City Mayor Michael Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. (AP Photo/Julio Cortez)

  • Michael Bloomberg

    New York City Mayor Michael Bloomberg talks to the media near the Empire State Building following a shooting, Friday, Aug. 24, 2012, in New York. Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. Police say a recently laid-off worker shot a former colleague to death near the iconic skyscraper and then randomly opened fired on people nearby before firing on police. (AP Photo/Julio Cortez)

  • Officials examine a body near the Empire State Building following a shooting, Friday, Aug. 24, 2012, in New York. New York City Mayor Michael Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. Police say a recently laid-off worker shot a former colleague to death near the iconic skyscraper and then randomly opened fired on people nearby before firing on police. (AP Photo/Julio Cortez)

  • An unidentified woman is treated by emergency medical technicians inside an ambulance following a multiple shooting outside the Empire State Building, Friday, Aug. 24, 2012, in New York. At least four people were shot on Friday morning and the gunman was dead, New York City officials said. A witness said the gunman was firing indiscriminately. Police said as many as 10 people were injured, but it is unclear how many were hit by bullets. A law enforcement official said the shooting was related to a workplace dispute. The official spoke on condition of anonymity because the investigation was ongoing. (AP Photo/Mark Lennihan)

  • This photo posted to an Instagram account belonging to a person identified as mr_mookie, an eyewitness at the scene, shows a victim of a shooting being tended to by pedestrians outside the Empire State Building in New York, Friday, Aug. 24, 2012. The identity or condition of the victim was not immediately known. Law enforcement officials in New York City say at least four people have been shot outside the Empire State Building in violence that stemmed from a workplace dispute, and that the gunman has been killed by police. The shooting happened at about 9 a.m. Friday at 34th Street and Fifth Avenue. (AP Photo/mr_mookie via Instagram)

  • Bystanders and a police officer stand on Fifth Avenue to view the scene after a multiple shooting outside the Empire State Building, Friday, Aug. 24, 2012, in New York. At least four people were shot on Friday morning and the gunman was dead, New York City officials said. A witness said the gunman was firing indiscriminately. Police said as many as 10 people were injured, but it is unclear how many were hit by bullets. A law enforcement official said the shooting was related to a workplace dispute. The official spoke on condition of anonymity because the investigation was ongoing. (AP Photo/Mark Lennihan)

  • Rebecca Cox

    Rebecca Cox talks to media while recounting what she saw immediately following a multiple shooting outside the Empire State Building, Friday, Aug. 24, 2012, in New York. At least four people were shot on Friday morning and the gunman was dead, New York City officials said. A witness said the gunman was firing indiscriminately. Police said as many as 10 people were injured, but it is unclear how many were hit by bullets. A law enforcement official said the shooting was related to a workplace dispute. The official spoke on condition of anonymity because the investigation was ongoing. (AP Photo/Mark Lennihan)

  • In this photo made with a cell phone, officials examine the body of gunman Jeffrey Johnson, who was killed by police gunfire after he fatally shot Steven Ercolino, an executive at his former company, outside the Empire State Building, Friday, Aug. 24, 2012, in New York. At least nine bystanders were hit by gunfire in the confrontation. (AP Photo/Lee Weinstein)

  • New York City police stand near the body of shooting victim Steven Ercolino, 41, on a sidewalk near the Empire State Building in New York, Friday Aug. 24, 2012. According to city officials, Ercolino, a vice president of sales for Hazan Imports, was fatally shot by Jeffrey Johnson, 58, a woman's accessories designer whom Ercolino had laid off, outside the Empire State Building setting off a chaotic showdown with police in front of one of the world's best-known landmarks. Police officers killed the gunman and at least nine others were wounded, some by stray police gunfire, authorities said. (AP Photo/Daniel Stevens/humanelectricblog.tumblr.com)

  • This cell phone photo taken by Brendan Gunn, shows the body of shooting victim Steven Ercolino, 41, in New York, Friday, Aug. 24, 2012. According to city officials, Ercolino, a vice president of sales for Hazan Imports, was fatally shot by Jeffrey Johnson, 58, a woman's accessories designer whom Ercolino had laid off, outside the Empire State Building setting off a chaotic showdown with police in front of one of the world's best-known landmarks. Police officers killed the gunman and at least nine others were wounded, some by stray police gunfire, authorities said. (AP Photo/Brendan Gunn)

  • Evidence lies on the street near the Empire State Building in New York following a shooting Friday, Aug. 24, 2012. Police say a recently laid-off worker shot a former colleague to death near the iconic skyscraper, then randomly opened fire on people nearby before firing on police. New York City Mayor Michael Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. (AP Photo/Julio Cortez)

  • Mark Hanrahan

  • New York City police approach the lifeless body of Jeffrey Johnson lying on a sidewalk near the Empire State Building in New York following a shooting Friday, Aug. 24, 2012. Police say 58-year-old Johnson, who was laid off from a nearby shop in 2011, shot a former colleague to death near the iconic skyscraper, then randomly opened fire on people nearby before firing on police. New York City Mayor Michael Bloomberg said some of the victims may have been hit by police bullets as police and the gunman exchanged fire. (AP Photo/Guillermo Ratzlaff)

  • Police surround a sheet covered body, lowser left, on a Fifth Avenue sidewalk as they investigate a multiple shooting outside the Empire State Building, Friday, Aug. 24, 2012, in New York. At least four people were shot on Friday morning and the gunman was dead, New York City officials said. A witness said the gunman was firing indiscriminately. Police said as many as 10 people were injured, but it is unclear how many were hit by bullets. A law enforcement official said the shooting was related to a workplace dispute. The official spoke on condition of anonymity because the investigation was ongoing. (AP Photo/ Louis Lanzano)