[2] She disappeared after leaving her school during her lunch break, and was found dead in undergrowth on Hounslow Heath near her home two days later.

[2][3] It was believed Morris left school because she had forgotten her raincoat that morning, choosing to return home to change into dry clothes.

[5] One source instead states that she had a double history lesson scheduled for that afternoon which she often avoided attending, and so played truant for the rest of the school day, although it is not clear what evidence there is for this claim.

[6] Another witness recalled seeing a girl who may have been Morris crouching at a bus stop on the Hounslow Heath side of Staines Road, just west of the Hussar public house between 12:20 p.m. and 12:40 p.m.[6] These were the last sightings of her alive.

[6] After she was reported missing a large search operation was launched to find her, involving hundreds of police officers, helicopters and members of the public who had volunteered to help.

[4][7] Two days later, on the evening of 18 June, Morris's body was found by a police dog handler on Hounslow Heath.

She was discovered face down in a copse beside a path on the edge of the Heath, at a location a quarter of a mile from her home in Cygnet Avenue.

[13][10] Police released a public statement after the death, warning parents in west London not to let their children cross Hounslow Heath alone.

[8] On 22 June, 4 days after she was found dead, a detective on the investigative team told the press that they felt another youngster playing truant could hold key information on the murder.

[16] Soon after Morris was found dead, her father received a phoned death threat from an unidentified teenage boy.

[17][3] In December 1980, the police appealed for a mysterious driver of a blue van with a radio telephone to come forward.

[20] In 2007, Morris's murder was one of a number of cases linked in the press to newly discovered Scottish serial killer Peter Tobin, who was found to have killed three women between 1991 and 2006.

[32] Police subsequently announced that all lines of enquiry had been exhausted and no evidence had been found to link him to any other unsolved crime.

[2][10] In 2015, crime writers Chris Clark and Tim Tate published a book alleging links between a number of unsolved murders and the infamous "Yorkshire Ripper" serial killer Peter Sutcliffe.

[30] In the book, the authors claimed that Morris could have been a victim of Sutcliffe, since he was believed to have been house-sitting nearby in Alperton with his brother at the time, and both were regularly cruising and picking up women in their cars for sex.

[6] According to the writers an identical pair of one-legged tights was also wrapped three times around both her wrists in front of her body and then over her breasts.

[37] Notably, the murders of Stratford and Weedon, as well as the cases of Parravincina and Morris, subsequently did not feature in the 2022 ITV documentary based on Clark and Tate's book.

[4] In 2011, crime writer Geoffrey Wansell released a book on Bellfield that also suggested possible links between him and Morris's murder, titled: The Bus Stop Killer: Milly Dowler, Her Murder and the Full Story of the Sadistic Serial Killer Levi Bellfield.