Sector commander to hold ‘Coffee with a Cop’ Lt. Jeff Slater to meet Jan. 18 with residents When Lt. Jeff Slater comes to Rossmoor for a “Coffee with a Cop” meet-up on Thursday, Jan. 18, he won’t be alone. That morning, he’ll bring a handful of Walnut Creek Police Department colleagues. Slater, the police department’s Sector 1 commander, will be in the Donner Room at the