At 5:17 p.m. he called a handler, identified as Associate-1 in the FBI complaint, who arrived in a white SUV two hours later. Driving around Alzabarah’s neighborhood, the two men called “Foreign Official-l” — al-Asaker, according to the Washington Post — at 7:20 p.m., and again at 7:22 p.m. and 7:31 p.m. They then called Dr. Faisal Al Sudairi, the Saudi consul general in Los Angeles, at 8:30 p.m., 8:38 p.m., and 9:26 p.m. Shortly after midnight, the consul general called Alzabarah back and spoke with him for three minutes.

Slightly off-topic: I feel that gives a good idea of how much information can be extracted from very simple metadata (here timestamp and number called) in that kind of context.