What is the test for reasonable suspicion of criminal activity?

detention will be justified if the combination of circumstances also supports a reasonable suspicion of criminal activity. [Citation.]" (People v. Daugherty (1996) 50 Cal.App.4th 275, 287.)" ' [T]he relevant inquiry is not whether particular conduct is "innocent" or "guilty," but the degree of suspicion that attaches to particular types of noncriminal acts.' " (Sokolow, supra, 490 U.S. at p. 10.)

The concept of reasonable suspicion cannot be reduced to " 'a neat set of legal rules.' [Citation.]" (Sokolow, supra, 490 U.S. at p. 7.) "The guiding principle in determining the propriety of an investigatory detention is 'the reasonableness in all the circumstances of the particular governmental invasion of a citizen's personal security.' [Citations.] In making our determination, we examine 'the totality of the circumstances' in each case. [Citations.]" (People v. Wells, supra, 38 Cal.4th at p. 1083.)