Quigg, 48, a state police traffic-accident reconstruction expert from Glenside, was killed in the crash, the examiner's office said. State police described the crash as "nearly head-on." Harper was wearing a seat belt; Quigg was not.
Preliminary screenings found no traces of drugs in Quigg's blood, the examiner's office said in a statement released by state police.
The statement said no additional comment would be forthcoming from colleagues who were grieving his death even as they investigated its circumstances.
"At this time, we . . . ask for your patience and understanding as we complete the investigation and attend to the needs of Ms. Harper and her family, as well as Cpl. Quigg's family and troopers who worked with him," the statement said.
State Police Trooper Danea Durham, who released the statement, said in a brief interview at the Philadelphia barracks on Belmont Avenue, where Quigg worked, that she did not know where he had been in the hours before the crash.
Quigg had been scheduled to appear Wednesday morning in Montgomery County Court for a pretrial conference on drunken-driving charges against him. That case arose from a Dec. 21 incident, in which his Honda rolled to a stop against a guard rail in the median strip of Route 422.
Police arrived to find him mumbling and unresponsive, with an open, almost-empty vodka bottle between his knees. (Durham said no such evidence was found in Quigg's car after Wednesday's crash.) Tests showed his blood-alcohol level to be 0.30 percent, according to court records.
He had been reassigned from accident investigations to desk duties to await the outcome of that case. He had also completed 30 days of alcohol rehabilitation and had been accepted into a court program for first-time offenders.
