These are the last known movements of a murdered university student whose body was found in the boot of a burning car.

Firefighters made the grim discovery of Janet Muller's body in Ifield, near Crawley, West Sussex on March 13.

Police have now released video stills and footage of the 21-year-old University of Brighton student in Portslade on the night before her death.

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Janet Muller was seen walking in a subway in Portslade, East Sussex, at 10.30pm on March 12

The images were released shortly after the youngster's family spoke about her 'bubbly' personality in a heartfelt tribute.

The bright student's family described her as an 'inspirational, passionate and caring person' and said her death had left a 'deep hole' in their hearts.

The day before the grim discovery, on March 12, Miss Muller had been reported missing from Mill View Hospital in Nevill Avenue, Hove, a Sussex Police spokesman said.

She was then captured on CCTV at 10.33pm that night in a subway in Portslade.

The second clip sees her in Station Road at 12.28am and the final one walking towards Brighton and crossing Sackville Gardens near the BP garage at 12.55am.

The German student, from Eastbourne, died of smoke inhalation, according to police.

Paying tribute to Miss Muller, her family said: 'Janet was a much loved daughter and twin sister and words can't describe how much pain we as a family are in right now.

'She was always there for us and was someone that always made us smile and laugh no matter what.

'Janet was a very inspirational, passionate and caring person. Throughout her life she always cared deeply for her friends and family.

'This tragic event has left a deep hole in the hearts of all that knew her. She will be deeply missed and always remembered for her energetic, fun, bubbly and vibrant personality.

'We are overwhelmed with the love and support that we have received from Janet's friends worldwide. Janet would have been so happy knowing how much she was loved.

Janet Muller was discovered dead in the boot of a burning car by firefighters. The 21-year-old died as a result of smoke inhalation

'We will never forget our beautiful girl and will work with the police to establish her last movements and why she was taken from us so cruelly. We won't rest until we find the truth.'

Detective Chief Inspector Karen Mizzi, of the Surrey and Sussex Major Crime Team, said: 'We are extremely grateful to Janet's family for their co-operation in agreeing to allow release of these images, which are the last known of Janet before she died.

'We are very keen to learn about her last movements between leaving Millview Hospital and the discovery of her body in Ifield on Friday, March 13.

Police and forensic officers at the scene after her body was discovered on March 13

'If you saw her in the area around those times or perhaps a little later, please email 101@sussex.pnn.police.uk or call 101 quoting Operation Madeira.

'Even if you think you may have seen her or that your sighting was only brief, please do call as your information could prove very important to us.'