Empire State Building gunman, Jeffrey Johnson, tells landlord: “I won’t be back”.

The Empire State Building gunman left his keys with his landlord on Friday morning, telling him he would not be returning, a police source said.

NBC News reported a police source told Reuters that Jeffrey Johnson, 58, left his keys with his landlord on Friday to allow renovation of his Upper East Side apartment and apparently intended to never return.

“He left the keys in an envelope for the landlord with no intention of ever coming back,'' said the source.

The unemployed accessories designer killed Steve Ercolino, with whom he had been feuding, on Friday in midtown Manhattan. Nine bystanders were wounded as the result of police gunfire, three hit by bullets and six injured by ricocheted fragments.

Reuters said police dismissed a report in the New York Post that Johnson was being evicted, but did say Johnson was forced out of his home due to renovations.

"It was not an eviction," the source said.

Johnson was subleasing the apartment from another tenant and the tenant informed Johnson he would have to leave during renovation of the apartment by the owner.

Detectives are slowing piecing together a profile of Johnson. A search of his apartment found books on training and fighting skills such as "Techniques and Equipment of the Deadly Marksmen Snipers" and "Attack Proof – the Ultimate Guide to Personal Protection," the source said.

ABC News said police also found a plastic case with 15 rounds of .45 caliber ammunition, the same kind he used to shoot his victim, Steve Ercolino.