A clothing salesman accused in the serial slayings of three Brooklyn shopkeepers says he is sure subway system surveillance tapes hold proof that he is innocent of at least one killing.
 
The Daily News reports that Salvatore Perrone asked a Brooklyn judge Friday for access to transit system video recordings. He said they will show he wasn't in the Brooklyn neighborhood where merchant Rahmatollah Vahidipour was killed in 2011.
 
The shopkeeper was one of three killed over five months.
 
Prosecutors say that when Perrone was first questioned by detectives, he confessed to two of the killings and offered the bizarre explanation that he was working with "the Palestinian section of the CIA.''
 
Doctors diagnosed Perrone with a personality disorder but a judge ruled him fit for trial.