Gary and fellow officer Eduardo Marmolejo were chasing a suspected gunman when they were both hit and killed by a train Monday night. The suspected gunman was later taken into custody.

Gary and Marmolejo climbed a hill to the tracks, looking for the fleeing suspect and evidence, \"determined to get yet another illegal weapon off the streets of Chicago,\" Chicago Police Superintendent Eddie Johnson said at Friday's service.

It was \"this sense of urgency that led them to put the thoughts of their own well-being aside,\" Johnson said. \"Their only concern was bringing the offender to justice and getting that gun off the streets.\"

Chicago Police Superintendent Eddie Johnson and First Deputy Superintendent Anthony Riccio lead the St. Jude delegation of fellow officers and command staff to pay final respects to fallen Chicago Police Officer Conrad Gary. pic.twitter.com/czrJUSfBsU

— Chicago Police (@Chicago_Police) December 21, 2018

Funeral services at St Rita Cascia Shrine for fallen officer Conrad Gary come to a close. CPD officers from the 005th District accompany their fellow brother today. pic.twitter.com/k897MksXX4

— Chicago Police (@Chicago_Police) December 21, 2018

Gary's colleagues expected him to quickly rise up the ranks within the Chicago Police Department, Johnson told mourners.

\"Unfortunately Conrad never got that opportunity because he made the ultimate sacrifice for all of us,\" he said. \"Every citizen of this city should be proud to call officer Conrad Gary one of their own.\"

The body of Fallen Officer Conrad Gary arrives at St Rita Chapel. #CPDstrong pic.twitter.com/Olbjr9zrmw

— Chicago Police (@Chicago_Police) December 21, 2018

Officer Conrad Gary arrives at St. Rita of Cascia Shrine Chapel. pic.twitter.com/tgzBXxLfQf

— Chicago Police (@Chicago_Police) December 21, 2018

Gary \"devoted this life to protecting others,\" according to the family GoFundMe page. \"He is loved by so many and will truly be missed.\"

\"Conrad is a true American patriot, a true American hero,\" Illinois Gov. Bruce Rauner said. \"He's an Air Force veteran, a Chicago police officer, dedicated public servant, who we will never forget.\"

Marmolejo's funeral is set for Saturday.

Gary and Marmolejo's deaths are the third and fourth in the line of duty deaths for the Chicago Police Department this year.

\"PHOTO:
Abel Uribe/Chicago Tribune via AP, Pool
PHOTO: The casket of Chicago police Officer Conrad Gary is brought into St. Rita of Cascia Shrine Chapel for a funeral service in Chicago, Dec. 21, 2018.
>

In November, Chicago police officer Samuel Jimenez was fatally shot in the neck while trying to protect employees and patients during a shooting at Chicago's Mercy Hospital.

In February, Chicago police Cmdr. Paul Bauer was shot and killed. Bauer, survived by his wife and daughter, had been sitting in his squad car when he heard a call over the radio and pursued a gunman on foot.

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