Police have released a security image showing the moment before a drunk teenage passenger died, falling between a train and the platform.
Prosecutors say the picture shows Georgia Varley, 16, from Wallasey, clearly leaning on the carriage as guard Christopher McGee signalled it was safe for the train to move.
45 year old Mr McGee is on trial for manslaughter at Liverpool crown court. He denies the allegation and another charge of failing to take reasonable care for the health and safety of others.
Earlier, a former boss revealed Mr McGee had received a safety briefing about the risks of such an incident just months before Georgia's death.
Liam Willis, who was responsible for guards on the network at the time, explained how in 2010 Mr McGee watched a safety video called Red 28 which highlighted how passenger safety depends on guards.
Nicholas Johnson QC asked Mr Willis what the message of the presentation was.
"We wanted to make guards aware of the associated risks and hazards," he replied
He added that another part of the presentation showed that "the highest risk was passengers falling between the train and the platform."
The court later heard evidence that, just two months before Georgia's death, Mr McGee sat through a safety briefing in which it detailed incidents where passengers had been killed or injured in similar circumstances.
The jury heard from a friend of Georgia's, Holly Nethercott, 17. She confirmed Georgia had drunk two thirds of a bottle of vodka and revealed a number of people thought she should have gone home.
She was so drunk, it was claimed, she fell down the stairs at her friend's 18th birthday party prior to leaving.
However, Georgia and a group of around 40 revellers left the party to board the last Merseyrail service from Manor Road station to Liverpool.
Miss Varley got off the train one stop down the line at Meols, concerned that she had left her bag at the party. She was persuaded back on board by Miss Nethercott and another friend.
It is alleged that Mr McGee witnessed this incident while carrying out checks at the station.
Miss Nethercott told the court that while the group had planned to disembark at Lime Street to walk to the Garland's nightclub, some had got off the train early at James Street and Georgia had followed.
The case continues.