The question we need to answer is: Was the incriminating data planted or not. Having a password manager on his phone is tangental to answer that question. After the computer and phone left his custody, either device could have had data modified. Unless he's got his data pinned into the Bitcoin blockchain, it's a pretty hard to show that it was planted. If it wasn't planted then it's really just about how the key was revealed.
P.S. The description does seem to describe a password manager:
"Specifically, the Cellphone Examination identified various passwords that had been input by the user of the Cellphone to, for example, access the phone, applications on the phone, and/or certain websites."
P.S. The description does seem to describe a password manager: "Specifically, the Cellphone Examination identified various passwords that had been input by the user of the Cellphone to, for example, access the phone, applications on the phone, and/or certain websites."