The Blue Ribbon Committee of the Senate of the Philippines launched an investigation into the matter and uncovered other issues, such as the supplied face shields' alleged substandard quality and how the company was able to secure a contract worth billions of pesos despite being founded only in 2019 with a small paid-up capital.

[4] These were signed by Lloyd Christopher Lao, Department of Budget and Management (DBM) Procurement Service (PS) Officer in Charge since January 2, 2020, in which Pharmally would supply the government supplies for the COVID-19 pandemic including personal protective equipment, surgical masks, face shields and RT-PCR test kits.

They questioned why a relatively new company with a small paid-up capital such as Pharmally topped the GPPB's list of suppliers with the highest total contract by May 2020.

[13] Pharmally chairman Huang Tzu Yen elaborated on Yang's role of being the financier and guarantor to Chinese suppliers on behalf of his company, contradicting director Linconn Ong's earlier statements.

[9] The investigation found out that Lin Wei Xiong was the Pharmally's financial manager who was in Dubai and did not appear in the senate hearings.

She also disputed the intelligence report of former anti-drug police officer Eduardo Acierto that claimed that both Yang and Lin are linked to the illegal drug trade.

[15][16] In September 2021, Senator Risa Hontiveros presented a video of an alleged male Pharmally warehouse employee who claimed that the company directed them to supply face shields meant for healthcare workers even those that are "deformed, soiled and substandard".

[17] Former executive Krizle Grace Mago was asked by Gordon if Pharmally's practice of changing the displayed expiration dates of the face shields tantamount to "swindling" the government in the September 24, 2021 hearing.

[19] She resurfaced on October 1, 2021, and was placed under protective custody at the Batasang Pambansa Complex of the House of Representatives due to fear for her life.

Committee chair Gordon was skeptical of the reasoning and surmised that she actually left due to shame of being associated with Pharmally in light of the ongoing investigation to which Mago confirmed.

Twinkle on the other hand said she would have to check with her company on which of the demanded documents can be produced citing data privacy and bank secrecy laws as well as the country's corporation code.

Duque has maintained he and his department was not part of the Pharmally deal and insist that the DOH is focused on the medical side of the pandemic response.

[25][26] Arrests orders against Pharmally officials as well as former presidential adviser Michael Yang who has been linked to the company for failing to attend investigation hearings by the Senate in September 2021.

[29][30] Mohit and Twinkle Dargani were arrested by the OSAA at Francisco Bangoy International Airport in Davao City while attempting to leave the country through a chartered flight.

She was released in January 2022 for humanitarian reasons after she recovered and finished her mandatory quarantine period with the understanding that she would appear in future Senate hearings if obliged.

Then Senate President Sotto issued a release order for the Mohit Dargani and Ong on June 2, 2022, to avoid being charged with "illegal detention".

President Duterte also defended Yang, stating that if such allegation is true, China would have advised the Philippine government not to deal with him and also brought up his links to Chinese Ambassador Zhao Jianhua.

[39] PDEA director general Wilkins Villanueva, brought up a 2004 anti-drug operation against a "clandestine laboratory" in Davao City where Yang was involved but not as one of the named targets during a Cabinet meeting.

[43] In February 2022, Duterte refused to comment when the draft report raised the possibility of charging cases against him for betrayal of public trust.

[47] The draft also include proposal to file charges against President Rodrigo Duterte when he steps down from office for having "betrayed public trust" when he appointed Michael Yang, one of the link parties to the Pharmally investigation, as presidential advisor.

Those who signed the draft were Dick Gordon, Ping Lacson, Manny Pacquiao, Koko Pimentel, Risa Hontiveros, Francis Pangilinan, Leila de Lima, Franklin Drilon, and Ralph Recto.

The Ombudsman also recommended the filing of one count of graft against former PS-DBM executives Christine Marie Suntay, Webster Laureñana, August Ylagan, and Jasonmer Uayan, and Pharmally's Krizle Grace Mago.

[2] Administrative and criminal charges against RITM staff (Amado A. Tandoc, Lei Lanna M. Dancel, Dave A. Tangcalagan, Jhobert T. Bernal, Kenneth Aristotle P. Punzalan, Rose M. Marasigan) were dismissed for insufficiency of evidence and due to lack of probable cause.

[50] In a separate resolution, the Office of the Ombudsman also found Lao, Liong, De Guzman, Laureñana, Ylagan, Uayan, and Suntay guilty of gross neglect of duty for their involvement in the irregular procurement of COVID-19 test kits from Pharmally.

"[52][53][54] In a September 12, 2024 resolution, the Sandiganbayan issued an arrest warrant with a recommended bail of P90,000 against Christopher Lao for alleged violation of Section 3, Republic Act 3019.