In May 2019 at a press briefing, he revealed that 14 employees of Gazipur City Corporation got show cause notice over corruption and irregularity charges.
[14] An account was opened in the name of Zahangir Alam at Premier Bank LTD's Konabari branch on February 25, 2020, and was later used for transactions involving Gazipur City Corporation (GCC) funds.
The account received Tk 2.60 crore collected as advance holding taxes and building plan penalties from four companies: Ispahani Foods Limited, Fin-Bangla Apparels Ltd, Honeywell Garments Ltd, and GMS Composite Knitting Ind Ltd.
The money was subsequently withdrawn by two of the mayor's caretakers, Polo Chakma and Shahidul, and never reached the city corporation's fund.
[16] Police arrested Anisur Rahman Selim, an assistant engineer of Gazipur City Corporation as a suspect of the murder case.
[18] On 4 October 2021, the Awami League sent a show cause notice to Alam after a video of him making controversial remarks on former president Sheikh Mujibur Rahman and the number of deaths in the Bangladesh Liberation War leaked and went viral on social media.
Tajul Islam, Minister of Local Government, Rural Development and Cooperatives, announced plans in December 2022 to return Alam to the Awami League and described his previous expulsion as a temporary suspension.