Steven, a college student, had a bad fight with his live-in…

Steven, a college student, had a bad fight with his live-in girlfriend, Heidi.  The two agreed to break up and Heidi moved out, but kept her key to Steven’s apartment. Three days after the break up, Heidi waited until Steven was in class, and then went to the police and reported that Steven was selling cocaine from the apartment.  Heidi told the police she was his girlfriend and lived there with him.  Without obtaining a warrant, the police went to the apartment with Heidi and asked her to let them in so they could search the apartment, which she did. The police found cocaine in the apartment.  Regarding the admissibility of the cocaine at trial,