The article clarifies that Senior National Bureau of Investigation (NBI) agent John Mark Calilung, who testified as the first witness in Vice President Sara Duterte's impeachment trial, has not been arrested.A viral video claiming his arrest is false and lacks evidence.The video, uploaded by a YouTube channel, aims to discredit the prosecution's witness without citing proof.Calilung was never detained after his testimony on July 7 and cross-examination by defense counsel on July 8.His role involved authenticating a November 2024 video where Duterte allegedly made grave threats against President Ferdinand Marcos Jr.and others.The impeachment case includes four articles, including misuse of funds and betrayal of public trust.The article emphasizes the importance of verifying claims to combat misinformation.