The alleged murderer of Libby Squire had a pink holdall full of sex toys, photos of young women and thongs, a court heard.
Pawel Relowicz, 26, is accused of raping and murdering Libby before dumping her in a river.
The dad-of-two is accused of picking up the distressed 21-year-old Hull University student as she wandered the streets having been turned away from a nightclub for being too drunk.
During the trial, a court heard how police searching his car after his arrest in connection with Ms Squire’s disappearance found a pink holdall full of “trophies” in Relowicz’s car boot.
The prosecutor said: “The defendant’s Vauxhall Astra was recovered to a police garage and from there it was photographed and examined.
“The boot was searched and it was found to contain, amongst other items, two masks and a pink holdall…”
He pointed out a picture of a clown’s mask to the jury.
Mr Wright continued: “The holdall itself was removed from the boot and its contents emptied and photographed.
“The bag was full of sex toys – vibrators, dildos, lubricant, condoms – and also contained some photographs of young women and several pairs of women’s knickers and thongs.
“…This pink holdall represented the trophies that the defendant had taken in a series of sexually motivated burglaries in and around the student area of Hull with which we are concerned in this case.
“Over more than a year preceding Libby’s death the defendant had been committing offences in which he would expose himself to women in public.”
The jury, of five men and seven women, heard that the defendant had previously pleaded guilty to nine sexually motivated offences committed over a number of months before Ms Squire’s death.
His crimes included exposing himself to or masturbating in front of women in public, watching women through the window as they changed or had sex, and burgling women’s homes with the purpose of stealing their underwear, sex toys or other objects, the court heard.
The court also heard that scientists found a DNA match of a “billion to one” which they claim shows Relowicz had sexual intercourse with Libby that night.
The prosecutor said a swab was taken from Libby’s body after it was found in the Humber Estuary.
He said: “In particular a swab was taken from high inside her vagina.
“A forensic scientist then examined that swab in order to determine whether any DNA could be detected on it from a person other than Libby.
“The scientist detected sperm cells on the high vaginal swab that she examined.
“The match probability of that DNA profile is in the order of one in one billion.
“…The inevitable conclusion of that finding, of the sperm and the matching of the DNA profile, is that this defendant had penetrative vaginal intercourse with Libby when he came into contact with her on the 1st February. “
Libby, a philosophy undergraduate, was last seen alive on January 31st, 2019, after a night out with pals, a jury have previously been told.
Her body was recovered from the Humber Estuary in Grimsby almost two months later.
The defendant denies one count of rape and one of murder.