Is this kind of case used to test a trainee agent?

Jimmy and Agent Torsten had lunch nearby and then parted ways, with Jimmy heading back to the hotel to rest. Although Hughes had asked him to meet with Supervisor Lambert today, he hadn't specified a time; why rush it when he could take a nap and go later, fully rested?

After 2 PM, Jimmy finished his nap and set off for the FBI's Dallas office. Fortunately, he hadn't returned his rental car yet; it would have been a big hassle if he had done so earlier in the day.

Technically, inter-office collaboration within the FBI is permitted. However, it's not a common practice as most offices have their own staff. It only usually happens when there's a shortage of personnel or a lack of specialists in a particular field. More commonly, they would contact either the DC headquarters, the FBI Academy, or the FBI Laboratory, the latter of which is in Quantico, as previously mentioned.