After a sixth email warning in June 2010, Mr. Angelastri says MasterCard demanded he hire a forensic investigator to do a thorough review of his system, essentially a digital version of the investigations that police often conduct at crime scenes.
Steinhardt said he worries that not all state laws clearly specify what types of tests police can conduct on the DNA samples collected from inmates and crime scenes.
The BBC's security correspondent Frank Gardner says Saudi Arabia generally prefers to conduct its foreign affairs through low-key, behind-the-scenes discretion.