The protester who was killed, Alex Pretti, 37, had a loaded handgun on him during the deadly encounter with federal agents and held a valid concealed-carry permit, officials said.
Questions have been raised further after a doctor who saw the aftermath from his nearby apartment said in an affidavit that agents delayed giving lifesaving aid.
Tax officials said the new policy is expected to significantly lower compliance costs, particularly for small and micro-enterprises as well as household businesses.
According to expert, the pig-nosed turtle is a non-native species that originates from freshwater environments in northern Australia and Papua New Guinea.
The police and the Singapore Civil Defence Force said they were alerted to the incident at about 7.20 am along the BKE towards the Woodlands Checkpoint.
Pretti remained on his hands and knees for several seconds before an agent in a gray jacket appeared to take hold of his gun, moments before the fatal shots were fired.
Pretti, an intensive care nurse with the Veterans Affairs department, was remembered by his devastated family as a kind, compassionate, and deeply caring person.
The Department of Homeland Security (DHS) said that the man took out his gun and threatened Fed agents while they were attempting to arrest an illegal criminal.