I never considered the tower’s receivers. You’re absolutely correct!
The police map shows a 0.25 mile radius circle centered around the intersection near where the jammer was found.
An antenna search of the area shows 30 towers and 158 antennas within a 3.0 mile radius.
http://www.antennasearch.com/HTML/search/search.php?address=37.136586%2C+-121.670683
The nearest traditional cell tower (not 5G) is a Sprint Nextel tower 0.8 miles away, well outside the circle.
http://www.antennasearch.com/HTML/individual/nonregTower.php?faa_study_number=00-AWP-2337-OE
I thought the police map reflected the area of existing complaints of signal loss, but you’re right, they should cast a wider net around the area.
Interesting that the police radios stopped working nearby. Their radios operate at 154 MHz, not one of the common jammer frequencies.