"There were people inside the store," Jones said. "There were residents who saw this going on. There were people driving. There was a multitude of witnesses there."
Gogian and Atherly were shot in the head, according to Topeka police Chief Ronald Miller.
Authorities, based on a tip, found Tiscareno holed up early Monday at a house about a mile away. When negotiations broke down, Kansas Bureau of Investigation agents fired tear gas inside. Tiscareno then emerged from the home with a gun and officers opened fire, according to the Shawnee County sheriff's office, which is leading the investigation.
Smith said investigators believe Tiscareno fired a shot outside the home before authorities returned fire. Tiscareno was declared dead at a hospital.
Online court records show Tiscareno was charged in September 2008 with one count of theft of less than $1,000. He pleaded no contest in April 2009 and was sentenced to 12 months of supervised probation. His probation was revoked in January 2010.
In March 2011, he was charged with criminal use of weapons and was sentenced that September to 12 months unsupervised probation.
Jones said he wasn't sure whether there was a drug deal or drug use going on in the parking lot; the person who called authorities reported drug activity.
The third officer at the scene was not hurt and has been placed on administrative leave with pay, which is standard procedure when an officer is involved in a shooting, authorities said.
The other people who were in the car when the shootings happened have been questioned. Authorities would not say whether they might face charges.
Miller said he had hoped that Tiscareno would be arrested so that he could stand trial.
"I knew in my heart that this community would give this guy up," Miller said. "One of the things that concerns me is that we don't really know why he did what he did."
The last time a Topeka officer was killed in the line of duty was 2000, and it's been longer than that since 1995 that one was fatally shot on the job.
Gogian had served with the police since September 2004 and had an adult son who's also a Topeka police officer. Atherly joined the department in April 2011.
Gogian was a retired Kansas Air National Guard sergeant and a former Marine Corp reservist.
"He had spent his life in service to his country and in the city of Topeka," Miller said.
Atherly was "just getting started" in his career, Miller said.
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