An NHS worker on her way to work was confronted by a man who threatened to shoot her and then went on to empty a bag of human poo over her head.
Liverpool Crown Court heard how Josh Wade, 21, was arrested after the early morning attack, near his home in Ford Lane, on Thursday, October 1 this year.
The victim, who's name has been withheld, would have been clearly identifiable as a member of NHS staff. She was left with faeces smeared over her head after the disgusting attack.
He was charged with unlawfully and maliciously administering a poison or other destructive or noxious thing, "namely human excrement", with intent to injure, aggrieve or annoy the woman.
Wade also faced a charge of harassment that put a person in fear of violence, namely that he "made threats to shoot her", as well as possession of cannabis.
He pleaded guilty to unlawfully and maliciously administering a poison or other destructive or noxious thing and possessing the Class B drug, reports the Liverpool Echo, who have chosen not to identify the victim.
Wade denied harassment that put a person in fear of violence, which was accepted by the Crown Prosecution Service at a previous hearing.
He appeared in the dock again on Thursday for his sentencing, supported by his crying nan and another woman, who were sitting in the public gallery.
Lloyd Morgan, defending, said both he and Ken Grant, prosecuting, agreed the judge might require further information about Wade's mental health.
Judge Rachel Smith said bearing in mind the facts of the case, what Wade said to a probation officer in an interview for a pre-sentence report, and "the suggestion of there having been some diagnosis", more evidence was required.
She said: "It might make a difference – I don't know whether it will – it might make a difference to culpability. It might make a difference in relation to further risk and any ancillary orders that might be made."
Mr Morgan said he had obtained his client's consent and signed authority for his medical records to be provided by his GP for the purpose of a report, which Wade would cooperate with.
Judge Smith questioned whether a psychiatric report or psychological assessment was required, but said reference was made to a "psychotic episode".
Mr Morgan said Wade had been referred by his doctor's surgery to Clock View mental health hospital in Walton in August this year, but at that stage Wade hadn't given his consent.
The court heard Wade had also received mental health treatment when previously living in Australia.
Judge Smith agreed a psychiatric report was required, which the court heard would take around two months to prepare.
The judge adjourned sentencing until February 5 and remanded Wade in custody until that date.