He was also charged with illegal possession of firearms.

他还被指控非法拥有火器。

《柯林斯英汉双解大词典》

No unit or individual may take illegal possession of, trade in or illegally transfer in other forms the grasslands.

任何单位或者个人不得侵占、买卖或者以其他形式非法转让草原。

youdao

The purpose of illegal possession of contract swindle refers to not only"illegal possession", but also "illegal occupation and use".

合同诈骗罪的非法占有目的，其含义不限于“非法所有” ，而是也包括“非法占用” ；

youdao

The court dropped a separate charge against Markovic for illegal possession of weapons.

CNN: Former Milosevic allies jailed

The Bollywood actor Sanjay Dutt, who was found guilty of illegal possession of arms, is due to be sentenced early next week.

BBC: NEWS | South Asia | Death penalty for Mumbai bomber

In addition, two brothers aged 16 and 17 accused of hiding the gun used to kill Sylvester deny illegal possession of a firearm.

BBC: Peckham murder trial: Sylvester Akapalara case begins