Officials say the driver of a 6,000-gallon milk tanker had lost control and overturned on the roadway.
Legal experts say Pennsylvania law provides limited options for officers to seize firearms in situations that are not criminal in nature.
The shooting that left a woman dead over the weekend in Tredyffrin Twp., Chester County, was a random act of violence, investigators said.
Only Action News was there as 35-year-old Michelle Mercogliano, of Phoenixville, entered Tredyffrin Township police headquarters.
Michelle Mercogliano, a special education teacher at Conestoga High School, was charged Wednesday by the Tredyffrin Township police.
One of the victims, Lee O'Donnell, said she'd just moved to the area a few months ago and purchased her brand new Honda CR-V last week.