NEW YORK (CBSNewYork/AP) — The mother of a man ambushed and killed in midtown Manhattan says New York City detectives found no drugs, weapons or evidence of any kind in her son’s Los Angeles condo.

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Sandra Wellington told The New York Times the detective returned the key to Brandon Lincoln Woodard’s apartment and told her they “found nothing.”

She said the detectives told her they were working day and night on the case. One detective told her “they were very close.”

But on Thursday, Police Commissioner Ray Kelly insisted police hadn’t identified any suspects in the execution-style slaying or determined why he was targeted.

“Leaks in this case are undermining, or certainly have the potential of undermining this investigation,” he said.

Based on surveillance video, detectives suspect Woodard was lured into the Monday afternoon ambush shortly after he checked out of a hotel in nearby Columbus Circle.

In a surveillance photo released Tuesday, the gunman is seen walking up behind Woodard and pulling a semi-automatic pistol from his pocket moments before he fired a single deadly round, police said.

After shooting Woodard, the suspect then calmly strolled to the corner of 58th Street and Seventh Avenue, hopped into the passenger seat of a waiting Lincoln sedan and drove away.

Police are still examining three phones carried by Woodard when he flew to New York on Sunday for reasons that are unclear. Investigators said he had not purchased a return plane ticket to Los Angeles.

(TM and Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2012 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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