I'm absolutely sure there was but that's not the point. Search warrant affidavits tend to be very formulaic: (1) the police officer identifies himself and describes his experience, (2) states that he is involved in an investigation of specific crime X, (3) states that he requests permission to search places Y and Z for specific types of items A,B, and C that are related to crime X, and then (4) explains why there is probable cause to believe that A,B, and C will be found in places Y and Z. It's common that the statements in item 3 will include something along the lines of "I believe that Person T has committed crime X based on (insert list of generic evidence descriptions here, like "statements made by Person T" or "testimony of a confidential informant believed to me to be reliable" or ""an evaluation of physical evidence and testimony of reliable witnesses"). The point is that the magistrate or judge is making a determination as to whether the reasons stated in item 4 amount to probable cause, not whether probable cause is supported in item 3. Item 3 is taken as true and is only important as far as it may create a link between the crime and the place to be searched.