[3] In February 2021, Aminul Islam represented the state at the trial of journalist Akib Hridoy, who had been sued under the Digital Security Act by the Kishoreganj District Deputy Commissioner Md Sarwar Murshed Chowdhury.
[4] In April, Aminul Islam was the prosecutor in the Major Sinha Md Rashed Khan murder case.
[8] In June, Aminul Islam and Justice Mustafa Zaman Islam expressed surprise at the custodial torture of a businessman by officer-charge of Padma South Bridge police station Mustafizur Rahman and Additional Superintended of Police Md Rasel Monir to extort 7.2 million BDT, despite the businessman securing bail from the High Court Division.
[10] Defense lawyers argued that the Niko corruption case should not continue against former Prime Minister Khaleda Zia since it had been scrapped against Sheikh Hasina.
[10] Aminul Islam and Justice Mustafa Zaman Islam granted anticipatory bail to Bangladesh Nationalist Party politician Nipun Roy Chowdhury following clashes between police and Bangladesh Nationalist Party activists in Dholaikhal on 29 July.