According to the police Jung Jiseok said he forgot the password to his own phone which means they cannot undergo further investigations and confirm whether he assaulted and did illegal filming of his ex-girlfriend.

Later,the prosecution decided to suspend the charges against Jung Jiseok after the complainant submitted an agreement and a letter of withdrawal.

He declared for the V-League draft upon graduation and was selected by the Korean Air Jumbos with the sixth pick of the second round (13th overall) in the 2013 V-League Draft, which made him become the first player to go pro directly out of high school.

In 2015, at 20, Jung was selected for the South Korean collegiate national team to participate in the 2015 Asian U23 Championship, the 2015 FIVB U23 World Championship and the 2015 Summer Universiade.

Jung also took part in the 2017 Asian Championship, where he helped his team to win the bronze medal.