The five-member panel of military judges is simultaneously hearing prosecutors' appeal against Elor Azaria's 18-month jail term, which they call "excessively lenient".
Israel's Channel 10 TV posted video of him smiling broadly and shaking hands with family and friends as he entered the military courtroom in Tel Aviv.
Azaria was convicted in January and sentenced the next month, after a trial that deeply divided Israeli society.
He was due to begin his sentence on March 5, but a military appeals court agreed to postpone imprisonment until judgement of his appeal.
The March 2016 shooting in the occupied West Bank city of Hebron was caught on video by a rights group and spread widely online.
It showed Abdul Fatah al-Sharif, 21, lying wounded on the ground, shot along with another Palestinian after stabbing and wounding a soldier, according to the army.
Azaria then shot him in the head without any apparent provocation.
He said he feared Sharif was wearing an explosive belt and could blow himself up, a claim judges rejected.
The Palestinian government described the 18-month sentence as a "green light to the occupation army to continue its crimes".
The trial captivated Israel and highlighted deep divisions in public opinion between those who decry his actions and those who see him as a hero protecting his comrades.
A number of Israeli politicians have called for him to be pardoned, including Prime Minister Benjamin Netanyahu.
The defence's decision to appeal was controversial, with three of Azaria's lawyers resigning from the case, saying they did not believe it served his best interests.
"The prosecution argues that the punishment imposed on the respondent is excessively lenient and is not consistent with the level of punishment which is acceptable and appropriate to the respondent's deeds," says their appeal.
Defence attorney Yoram Sheftel's 44-page appeal alleges the court ignored video clips that he says support Azaria's version of events while the prosecution evidence does not stand up to scrutiny.
Channel 10 quoted him as telling the court on Wednesday that while he and his assistant were two defenders, "there are millions more who believe in Azaria's innocence," an apparent reference to public support.
Disclaimer: No Business Standard Journalist was involved in creation of this content
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
