A link in the patch article directs to a copy of Elmhurst PD's report on Jake's disappearance. It looks as if the investigating officer asked Chase and USAA Banking for the info. There's no mention of a warrant or subpoena.
Elmhurst Missing Man 'Fantasized About Going Off Grid': Police
https://www.scribd.com/document/474685437/Elmhurst-Police-Department-Report-on-Jake-Cefolia
snipped from page 14-
Contact was made with Pieter Post, a regional investigator with Chase, to see if the missing person had used this credit card since reportedmissing. Post was able to supply me with documentation showing that Cefoiia had no activity on his credit card since August 7th, with the last transaction being at the Sheil Station in Elmhurst, 218 E Butterfield Road.
On 08/12/20, contact was also made with David Gamez, an investigator with USAA Banking. Gamez relayed to me that Cefofia did have anaccount with USAA, which is an active checking account that appears to be used for automatic bill payments and not for daiiy use. Gamez alsorelayed that there have been no large cash withdrawals in the past 7-10 days.