Yes. You have the right to have someone of your choosing (generally an advocate, friend, or someone from the prosecutor's office) attend interviews with you, as long as there is not a conflict. An example of a conflict would be that the person you wish to attend the interview is also a witness in the case. One thing to keep in mind, however, is that whoever attends the interview with you may become a witness at trial. If you have someone in mind that you want to attend trial with you, then it is best not to have that person attend the interview with you as well.