Cairo (CNN) -- Former Egyptian President Hosni Mubarak could be executed if he is convicted of ordering the killing of protesters, Egypt's justice minister says.

"One of the charges he is facing is complicity in the killing of martyrs and issuing the orders for premeditated the killing of those people," said Justice Minister Mohamed Abdelaziz al-Juindy. "This is a charge with a harsh punishment -- the death penalty."

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He is also being probed on allegations of corruption and misuse of state funds.

"There are reports that the former president's wealth is in the billions, and indeed it is billions," the justice minister asserted.

So far "we can't ascertain the exact amount, but the investigation is underway," he said.

Mubarak's trial will show that the rule of law is supreme in the country, al-Juindy said.

"The law is respected in Egypt and is applied onwithout any everyone exception," he said. "This is very important because Egypt now has become a country were the law is sovereign."

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