What are the relevant factors for determining whether a juvenile suspect has been arrested during a police interview?

261, 270-271 (J.D.B.) [declining to determine specific relevant circumstances].) "Although no one factor is controlling, the following circumstances should be considered: '(1) [W]hether the suspect has been formally arrested; (2) absent formal arrest, the length of the detention; (3) the location; (4) the ratio of officers to suspects; and (5) the demeanor of the officer, including the nature of questioning.' [Citation.] Additional factors are whether the suspect agreed to the interview and was informed he or she could terminate the questioning, whether police informed the person he or she was considered a witness or suspect, whether there were restrictions on the suspect's freedom of movement during the interview, and whether police officers dominated and controlled the interrogation or were 'aggressive, confrontational, and/or accusatory,' whether they pressured the suspect, and whether the suspect was arrested at the conclusion of the interview. [Citation.]" (People v. Pilster (2006) 138 Cal.App.4th 1395, 1403-1404.) In addition, a juvenile suspect's age is a relevant factor, "so long as [it] was known to the officer at the time of police questioning, or would have been objectively apparent to a reasonable officer." (J.D.B., supra, 564 U.S. at p. 277.)