ADAMS COUNTY, Colo. (CBS4) – Adams County investigators are searching for three men wanted in connection with a Halloween murder.

Dillon Bueno, 24, was shot and killed in the driveway of his parents’ home near 74th Avenue and Krameria Drive. It happened just after 9:30 p.m. on Saturday.

READ MORE: Report Shows RTD Union Station Problems Festering For Years: 1/3 In Survey Feel Safety At Risk When Using RTD

“Dillon had just given the last bit of the candy out. He came outside with a friend,” Bueno’s mother Lucy Malone said.

Dillon Buenos (credit: CBS)

Dillon Buenos (credit: CBS)

Moments after he walked out the door Malone says she and Dillon’s father, Leo Bueno, heard gunshots. When they ran outside to see what was going on they found their son had been hit.

“She tried doing CPR and I was holding his hand, telling him hang on. Keep breathing, keep breathing,” Leo Bueno said.

Dillon Bueno died before reaching a hospital.

“There was nothing they could do,” his father said.

(credit: CBS)

(credit: CBS)

READ MORE: Sabrina Spellman Makes An Appearance On The CW's Riverdale; Kiernan Shipka Reveals 'Fans Will Get Some Clarity'

A witness told investigators the gunman approached and demanded Dillon Bueno hand over any valuables. When he refused the suspect opened fire; his two accomplices took off running.

According to the Adams County Sheriff’s Office, the three suspects were wearing “Halloween type” costumes described as black hoodies with skeleton bandanas.

The family says they were skeleton masks that covered their faces from the nose down. They are now asking for the public’s help tracking those suspects down.

Dillon Buenos (credit: CBS)

Dillon Buenos (credit: CBS)

“We just want justice, we don’t want revenge, we just want the person caught that is responsible for this. He had a full life ahead of him and he had big plans,” Malone said.

The Adams County Sheriff’s Office says the three suspects are believed to be black males in their late teens to early 20s. Their height ranges from 5-foot-5 to 5-foot-8 and have slender builds.

Anyone with information is asked to contact Detective Lee Page at (720) 322-1234 or the Adams County Sheriff’s Office.

Those who would like to help the family as they prepare for a memorial can visit the Dillon Buenos GoFundMe page.

MORE NEWS: Denver City Council Plans Final Vote On Flavored Tobacco Ban

Karen Morfitt Joined the CBS4 team as a reporter in 2013. She covers a variety of stories in and around metro Denver. Follow her on Twitter @karenmorfitt or email her tips.