Richard Rhodes, a 37-year-old contractor who was working on a house near where the shooting happened, tried to save Lane's life by performing CPR, he told Fairfax Media.
"I was like this, telling him, 'Buddy, stay with us; stay with us,'" Rhodes said, showing how he knelt next to the victim.
Lane, 23, was gasping for air, and soon the gasps stopped.
Rhodes and a woman together performed CPR until it became apparent that Lane had died, Fairfax reported.
Lane's friends and family are being invited to a memorial game in his honor Sunday, and a donation page has been set up to raise money for a memorial fund in his name.
A former student and classmate at East Central University, where Lane was studying, described him as "a charming guy, genuinely good person, with great character and had a love for life."
"As cliched as it sounds, Chris was the kind of guy you want your sons to grow up to be and that you want your daughters to marry. It just breaks my heart knowing how much more he could have brought to this world as a husband, father, son, brother and friend," Sam Malchar said.