DENVER -- Hundreds of people packed a downtown theater Thursday to pay tribute to a prosecutor who was shot and killed in his own back yard.

Denver police say the person who killed Adams County Deputy District Attorney Sean May was probably lying in wait and shot him in the head and abdomen as he was walking home from work Aug. 27.

May, 37, is survived by his wife, Corin, who is pregnant with the couple's first child, a boy that the couple had lovingly nicknamed "LB" for Lima Bean -- which was what the unborn child looked like in their first ultrasound, friends say.

May was remembered by friends and family as a smart, humble, sports-loving and show tune-loving "dork," with quirky sense of humor and a passion for justice.

"Be who you are and don't be afraid to be the dorkiest guy in the room. Sean most certainly never did and he turned out pretty damn great," said his brother Matt May.

Friends described May as obsessed with the Buffalo Bills, baseball, and Broadway musicals. During the funeral, held at the Buell Theater in the Denver Center for the Performing Arts, songs from "Wicked" and "Spamalot" blasted through the speakers. Because he often broke out into song at the drop of a hat, the audience was asked to sing along to "All You Need Is Love" to remind his widow that his tune will carry on through them.

"I love him as much as any show tune-loving straight guy can love another show tune-loving straight guy," joked fellow prosecutor Ted Tow.

Tow said May could have easily landed a prestigious high-paying job at any law firm in the country. Instead he chose to serve the people volunteering to work in the Child Victim Unit.

"He made the world a better place. I say farewell, friend. See you at the curtain call," Tow said, touching the casket.

May lived in Denver but worked for the district attorney in neighboring Adams County for seven years, serving in the Child Victim Unit before his recent promotion to chief deputy for county court.

The governor, who ordered that all state and U.S. flags fly at half-staff on the day of May's funeral, remembered May as a public servant -- an ideal prosecutor who serves society at a trying time.

"The prosecutor stands in the middle of a ripple effect and says, 'I'm here.' And tries to calm and provide a buffer against the ripple for victims, witnesses, people in community and even the defendants," Gov. Bill Ritter, a former prosecutor, said.

Investigators are still searching for leads into May's death. No arrests have been made. Police have offered a reward for information leading to a suspect. They are not even certain that his killing is connected to his job.

But Adams County District Attorney Don Quick, May's boss, is convinced that May died in the line of duty.

"I don't know why that man decided to take Sean, to take one of God's greatest blessings that day, but if he was here, I would tell the shooter that if it was done to make us doubt each other and drive us apart, you've failed," Quick said. "If it was done to intimidate us, to make us question the criminal justice system, you failed ... If you shot Sean to silence him, you failed. Because you will hear Sean May's commitment and fairness in colleagues everyday in court ... If you shot Sean May because you were so cruel -- that you try to have Sean's child not know his father -- you have failed again. Through Corin and his family, that child will know his father. And last week that child may have lost his dad but he gained 160 godparents -- the men and women of the Adams County District Attorney's Office."

Quick said the everyone in the Adam's County District Attorney's Office wanted to jump in and help Denver police and prosecutors find May's killer but they realize that the case is in Denver's jurisdiction, and it will ultimately be solved.

May's colleagues said May once stayed in a basketball game after coming up with a noticeable limp, and two weeks later learned he had broken his leg.

After earning his undergraduate degree from Stanford, May earned his law degree from the University of Virginia Law School. He landed a job at a private law firm but eventually gave up a six-figure salary to work as a prosecutor, where the starting pay is about $45,000 a year.

"I always had the sense that he might want to go into public service, so I wasn't terribly surprised by that," said Jim Linfield, managing partner of the Colorado office of what is now Cooley Godward Kronish, the private firm where May worked.

May Featured In ABC's 'In The Jury Room'

May was briefly in the limelight as one of the prosecutors in ABC News' 2004 "In the Jury Room," where the network won permission to film while defense attorneys plotted strategy, prosecutors worked on their arguments, and the jury deliberated. The Colorado Supreme Court approved the arrangement.

During one segment, May was practicing his opening statement in the living room while his dog lay on the floor, watching him.

At one point, May stopped, stared at his notes and turned to his dog. "Hey, Mulder," he said. "You wanna try this again?"

Defense attorney Douglas Romero told the Rocky Mountain News that May had called him minutes before he was killed and told him about threats he received from a relative of an 11-old-girl who was the victim of a peeping tom in a store changing room.

Romero had represented the defendant, winning a reduced conviction of harassment, which carried a fine but no jail time. May called Romero concerned that the defense attorney could be in danger, too.

The News said May made the call at 5:44 p.m. on Aug. 27. May was gunned down at 6:20 p.m.

Police spokesman Sonny Jackson on Thursday would not comment on the phone call or whether it was part of the investigation. He also declined to say whether investigators believe May's death was random or connected to his work as a prosecutor.

"We're looking at the totality of the case," Jackson said. "We're not going to hone in on part it."