Authorities on Friday released the results of an autopsy performed on a man who was shot and killed at the south Lincoln Chick-fil-A Tuesday afternoon. 

Lincoln police said 48-year-old Joseph F. Cimino was shot three times in the chest by BNSF Special Agent Christopher Hall. Police said the gunshot wounds were the cause of death. A toxicology report is still being processed. 

Emergency crews were called to the restaurant around 1:07 p.m. in what was originally classified as a traffic collision, after Cimino caused a disturbance and drove his truck into the building near 27th and Pine Lake Road. 

Lincoln Police Chief Jeff Bliemeister said Cimino was upset about the food he received, and began throwing food and tables inside the restaurant. Cimino also was involved in an altercation with another patron and was escorted out of the restaurant before getting in his pickup truck and backing up into the store. 

Police said none of the customers or employees,who fled the restaurant, were injured.

Hall was in the drive-thru getting lunch, and police said he was in a marked vehicle and in his uniform. He then began performing CPR on Cimino. 

Police have not released a motive, and said there is no indication Cimino was there for any reason other than as a customer. 

Bliemeister said search warrants were carried out at Cimino's residence, and that they had prior contacts with him. Channel 8 Eyewitness News was unable to find any criminal records for him. 

Bliemeister said Cimino was armed with a commercially available electronic control device similar to a stun gun. 
 
A BNSF spokesman told Channel 8 Eyewitness News Hall is an eight-year-veteran. The spokesman said Hall has been placed on routine administrative leave pending the ongoing investigation.