Hillsborough inquests hear evidence about four more victims
The jury were told there is little evidence of Christopher's experience on the terraces.
He was last seen alive at 14:57.
In a video clip starting he was seen being carried onto the pitch and given CPR.
Brenda Campbell, asking questions on behalf of Christopher's family pointed out there was a two minute delay between Christopher being carried out and CPR beginning.
She asked expert Professor Jerry Nolan that if treatment had begun before he'd been carried from the pen, could he have survived?
Professor Nolan said it would have made a difference but he couldn't tell if that was feasible.
Cause of death was compression asphyxia.
Witness Ian Johnson said he'd seen Henry in Pen Three.
He told the inquest he was struggling to breath, his face turned blue and he collapsed.
Photographs show Mr Burke lying unattended on his back on the pitch.
Expert witness Professor Jasmeet Soar agreed that he appeared to have been left unattended on the pitch for over two minutes.
Under questioning he agreed it was possible he may have been alive then and that his breathing may have been compromised by not having been placed in the recovery position. And that if he had, he may not have died.
Cause of death was compression asphyxia.
A witness described Andrew being pushed up against a barrier in Pen Three. He was very distressed, the court heard.
Video footage showed Andrew lying on the pitch.
He was checked by an off-duty mental health nurse who said he didn't find a pulse on anyone he checked that day.
Andrew was then transferred across the pitch on an advertising hoarding. CPR was given but there was no response.
Professor Soar agreed that there was a gap of four minutes in which Andrew didn't receive any resuscitation attempts, and that if he'd been treated earlier, he may have survived.
Cause of death was compression asphyxia.
A witness Derek Richards said he saw Carl in Pen Three at around 15:10.
He was gasping for air.
Video showed Carl lying amongst bodies at the front of Pen at 15:21.
He was moved to Pen Two and then on to the pitch.
Four separate attempts were made to revive Carl; on the pitch, twice on a service road at the back of the stadium and then at The Royal Hallamshire Hospital.
But death was recorded at 17:05.
At the inquest today expert Pathologist Dr William Lawler was questioned over two separate explanations that two neuro-pathologists had given regarding the swelling to Carl's brain which was discovered at the post-mortem.
One explanation could have meant that Carl may have been alive longer than what was previously thought.
But as both explanations were plausible, Dr Lawler couldn't conclude "one way or the other".
Cause of death was compression asphyxia.