All agree that scores angry at Egypt's military-backed government and the ouster of President Mohamed Morsy died in late-night clashes in the volatile nation's capital.
But they are of opposite minds as to who began firing first and who is to blame.
Dr. Mohammed Ali Sultan, chairman of Egypt's ambulance services, told CNN that 72 had been killed in Nasr City, an area of Cairo the Muslim Brotherhood has made its base after the group's former leader was forced from power and ordered jailed.
Medics in a Brotherhood field hospital there earlier Saturday had put the death toll at 66, with another 61 on life support and thousands more wounded.
How did they end up in such straits?
Ask the Muslim Brotherhood -- the Islamist group that was sidelined under longtime Egyptian leader Hosni Mubarak only to become the country's dominant political force after his forced exit in 2011 -- and its members will say police fired live ammunition on protesters Friday and Saturday.
A wounded protester getting medical treatment at a field hospital said he saw men in plainclothes fire on pro-Morsy demonstrators with shotguns.
He referred to them as "thugs," a term commonly used for young men who support the government and resort to violence.
"Police forces were standing behind them. Also, military forces were outside blocking three entrances to Rabaa Adawiya neighborhood," the protester said, adding he had also seen corpses with gunshot wounds at the hospital.
Yet the prosecutor general's office, according to a report early Sunday on state-run Nile TV, concluded that protesters not only initiated the clashes but also fired live bullets on security forces.
A police spokesman likewise rejected any allegations police opened fire, saying they only used tear gas canisters and were not responsible for the deaths.
Interior Minister Mohamed Ibrahim offered a similar view during a televised news conference.
The protesters were at fault for starting violence that wounded 14 police, none of whom fired back, he said.
"I want to emphasize here that the Interior Ministry police force has never and will never fire its weapons at any Egyptian citizen," Ibrahim said.
Fresh clashes erupted early Sunday in Helwan south of Cairo between residents there and pro-Morsy protesters, reported state TV, citing witnesses.
Meanwhile, an attorney has filed a lawsuit at a district court in Cairo, asking that the military overthrow of Morsy be overturned. Tarek Al Kashef is basing his challenge on the country's constitution, specifically sections that stipulate that a presidential term is four years and that the president is the commander in chief of the armed forces. A hearing is slated for October 8.
Morsy may join Mubarak -- in prison
Morsy has not been seen publicly since the military forced him from office July 3.
The military has not commented on his whereabouts, though a Brotherhood spokesman told CNN he was initially under house arrest at the presidential Republican Guard headquarters in Cairo and later was moved to the Defense Ministry.
Nasser Amin -- a lawyer who met with Morsy's former chief of staff, Refa'a al-Tahtawi, who also is being detained -- told CNN that the former president is being "treated with the utmost respect ... like a statesman."
Yet Amin said that Morsy and others who are being held "can't contact the outside world or lawyers."
The former Muslim Brotherhood leader became Egypt's first democratically president in June 2012 but found himself at odds with the opposition before the military removed him from power and detained him this month.
State media reported he's being held in relation to a jailbreak that took place during Egypt's 2011 revolution but well before he came to power.
Prosecutors, who ordered a probe two weeks ago, said the escape of Morsy and 18 other Brotherhood members (among others) was plotted by "foreign elements" including Hamas, its military wing, the Islamic Palestinian Army and Hezbollah. The Muslim Brotherhood was named as a domestic group that cooperated with those who broke them out of prison.
Morsy -- who local media reports say was in prison for a single day without any formal charges against him -- is accused of escaping, destroying the prison's official records and intentionally killing and abducting police officers and prisoners.