United States Postal Service [USPS] review: item missing - not delivered

Mailed item from Los Angeles to Virginia with USPS Tracking. Tracking shows the item arriving at USPS in Bell Gardens, CA 90201 - sort facility but never leaving. Assumption - USPS employee stole my package. Day after day I am promised a phone call from a detective but never receive one. All they do is stall and won't lift a finger.