According to the accounts that have come down to us the main allegations against Uthman were that he had appointed the Umayyads to high offices; that he had allowed liberal grants out of the Baitul Mal to his favorites; and that he had played into the hands of unscrupulous persons. I have discussed all these allegations in the earlier part of this book.
My conclusion is that there is no force in these allegations.
This means that most of the allegations are false, and if any allegation is factually correct, Uthman was justified in doing whatever he did.
"When a person dies, his works end, except for three: ongoing charity, knowledge that is benefited from, and a righteous child who prays for him."
Prophet Mohammed (PBUH)
"The best of what a man leaves behind are three: a righteous child who supplicates for him, ongoing charity the reward of which reaches him, and knowledge that is acted upon after him."
Sunan Ibn Mājah
"Every day two angels come down from Heaven and one of them says, 'O Allah! Compensate every person who spends in Your Cause,' and the other (angel) says, 'O Allah! Destroy every miser.'"
Sahih Bukhari