Police believe Michael Jackson used secret email accounts to buy prescription drugs.

Detectives in Los Angeles have recently discovered the late pop legend had accessed AOL and Gmail accounts in the run up to his death in June from a suspected cardiac arrest and plan to search his personal messages for evidence he used them to acquire medicines illegally.

A source told Britain's Daily Mirror newspaper: 'They could hold vital evidence with regard to Michael's death and the drugs he was using regularly. Not only did he get prescription drugs through a network of doctors, it's believed he may also have got them from illegal websites or drug cartels. The Los Angeles Police Department (LAPD) has to get a search warrant first and this takes a few days.'

Police are also keen to search a private mobile phone belonging to the 'Thriller' singer.

Since his death, it has emerged Michael had been prescribed a number of drugs – including the powerful sedative Propofol, also known as Diprivan – by a number of doctors.

His personal physician Dr. Conrad is being investigated over manslaughter claims.

Meanwhile, medical expert Dr. Susan Etok has claimed she was asked by the 'King of Pop' to prescribe him Diprivan and discovered a secret stash of drugs in his bathroom – which she took a sample of and gave to police.

She said: 'Alarm bells went off in my head and I knew I needed to get out of there right away.

"There was a just a whole bunch, like a box with stacks of different medicines. And I took just a sample of those just to see what they were. There were just so many, and just paraphernalia such as syringes, tourniquets and surgical gloves and masks.

'It was just crazy. At the time I didn't really know what they were. I was just really shocked. There was just so much medication, just like looking into a pharmacy, and I thought, 'What is he doing with all of this?' So I took some of these medications and I took them home and I looked them up and I asked family members, and I found out that they were anti-depressants and things like that, and I just thought no, this is not right."

Dr. Etok claims to have met with the singer on March 6 at London's Lanesborough Hotel.

She told website ET Online: 'He was upset about the fact the British media were very harsh on him, and how he was hurting. He kept on talking about how much he was hurting. I wasn't sure whether it was emotional pain or whether it was physical pain, and he said he needed me to help him.'

Meanwhile, Michael's mother Katherine – who has guardianship of his three children, 12-year-old Prince Michael I, Paris, 11, and seven-year-old Prince Michael II, also known as 'Blanket' – is looking at sending the grieving trio to school.

The children have been taught at home their whole lives, but their grandmother is making enquiries into Los Angeles' prestigious Buckley school, which is near the family home in Encino.

The children and Katherine spent the weekend at the luxury Palms Casino Resort in Los Angeles.