Search warrants from the investigation into Prince's overdose death were released on Monday, revealing that prescription medications were found all over his house — including some in the name of a confidant who claimed he didn't know the singer was addicted to pain pills.

The court documents detail investigators' efforts to obtain cellphone and Internet records after Prince was found dead April 21 at his Paisley Park estate in Minnesota.

An autopsy determined he died of a Fentanyl overdose, but the documents do not indicate if authorities have pinpointed the source of the killer dose of the synthetic opioid. No one has been charged with a crime in connection with Prince's death.

The warrants say that controlled substances were found in bottles all over the Paisley Park complex, often in vitamin bottles. Some were in a suitcase labeled with a Prince alias, Peter Bravestrong.

Several medications were prescribed to Prince under the name of Kirk Johnson, his longtime bodyguard, assistant and personal friend. The doctor who prescribed them said he used Johnson's name "for Prince's privacy," one warrant says.

While Johnson told investigators he was "unaware Prince was addicted to pain medication," a detective wrote that it was "reasonable" to think, given their close relationship, that "Johnson would have had knowledge of Prince's abuse of prescription medication."

Among the other revelations in the warrants:

  • Prince stopped using a cellphone after being hacked, depending on email and a landline.
  • He was in a romantic relationship with singer-songwriter Judith Glory Hill from 2014 until his death.
  • He didn't have a regular doctor for most of his career; his team would arrange for a variety of doctors to give him B-12 shots before performances.