Authorities investigating the death found prescription opioid medication on him, according to news outlets on Wednesday including CNN, the Minneapolis Star Tribune and others that cited anonymous law enforcement sources. Kamerud declined to comment Thursday on the reports of drugs found at Paisley Park, and told AP that he strongly disputed reports by several media outlets that investigators had asked the U.S. Drug Enforcement Administration for help in the case. Olson has said a cause of death probably won’t become public for weeks, after the Sheriff’s Office receives reports from the medical examiner and toxicology results. An affidavit in support of sealing the warrant, signed by Carver County Chief Deputy Jason Kamerud, also warned that disclosing details in the warrant could cause "the search or related searches to be unsuccessful" and risk injury to innocent people. He added that the release of the information could also create a substantial risk of injury to an innocent person or persons or severely hamper the ongoing investigation. In a court order dated Thursday, state District Court Judge Eric Braaten approved sealing the results of the search for 180 days or until the beginning of court proceedings, whichever comes first. The search warrant for Prince's Paisley Park home and studio — carried out the day of his death — was filed Thursday under seal at the request of investigators who said it would hamper their investigation if contents were public.
– Investigators suspect an overdose of prescription drugs caused Prince's death last week and they want to find out exactly where he got them, according to a source close to the investigation. The probe is looking at whether a doctor was on Prince's plane when he made an emergency landing in Illinois the week before his death, and whether he overdosed on the plane, a law enforcement official tells the AP, which notes that the development is worryingly reminiscent of Michael Jackson's death. The source confirmed reports that the opiate painkiller Percocet is believed to have been involved. Documents released on Thursday signal that the investigation is now a criminal probe and charges are a possibility, the Star Tribune reports. The documents released by the Carver County, Minn., sheriff's office Thursday include a request to seal the results of a search conducted at Prince's Paisley Park the day he died, Reuters reports. A judge granted the request, which was made on the grounds that "intense media scrutiny" could hamper the investigation or risk injury to innocent people. Carver County Chief Deputy Jason Kamerud declined to comment on reports of drugs found at Prince's home. He tells the AP that contrary to media reports, investigators have not asked the DEA to get involved. "We might contact them to help us, but that hasn't happened," he says. "We don't have the medical examiner's report yet. We don't know to what extent pharmaceuticals could be a part of this." (Prince was given a private send-off last weekend.)