INTERACTIVE: Travis Forbes timeline
Monge, 19, was reported missing April 1 after leaving a Denver nightclub. Police found her body Wednesday in Weld County, buried under a cottonwood tree near Keenesburg.
Denver District Attorney spokeswoman Lynn Kimbrough says Forbes, 31, faces one count of first-degree murder in the death of Monge.
9Wants to Know learned Thursday afternoon that Forbes confessed to Monge's murder and is cooperating with police. Forbes allegedly told investigators the morning Monge disappeared, he dropped off his friend, then Forbes and Monge got into a fight and he killed her.
The coroner also confirmed on Thursday that the remains found in a Weld County field on Wednesday were Monge's.
9Wants to Know learned Forbes physically took investigators to the crime scene Wednesday and showed them the exact spot where Monge was buried, near Interstate 76 and Weld County Road 53.
Monge was last seen with Forbes at a Denver gas station off Speer Boulevard. Earlier that evening, she became separated from her friends after a night of clubbing on Market Street in Denver.
On Thursday, Monge's family reacted to the charges.
"We're still in shock I think, we're still getting information, what little is coming in," Monge's stepfather, Tony Lee, said.
Lee says he's had a suspicion this day would be coming for a long time.
"I've prepared myself for this day," he said. "It didn't do any good. I have all along known this was going to be the outcome."
"It's come to the point where I need to know the truth and yesterday and today I got the truth. I thank God and I thank the police and I thank everybody who is helping us because I need to know the truth," Monge's mother, Maria Lee, said.
Tony and Maria Lee say they've always been suspicious of Travis Forbes.
"I shook his hand and when I shook his hand, how he felt, how he was shaking, I knew that I was shaking the hand of the last person who saw Monge alive," Tony Lee said. "There is no doubt in my mind at that point."
They say they have no doubt that justice will be served, and are now making funeral arrangements.
The family has established the Kenia Monge Benefit Fund. Donations can be made at any First Bank branch.
The Denver DA's office says Forbes is still in custody on an unrelated case in Larimer County, where he is charged with attempted first-degree murder. Forbes is suspected of beating and sexually assaulting a woman in Fort Collins and setting fire to her apartment on July 5.
He will appear in court in Denver on Sept. 23 to be formally advised of the charge against him.
Maria Lee has little to say about the man now charged with murdering her daughter.
"He hurt my family. He hurt me," she said. "But you know, justice will be done."
Tony and Maria Lee hope others will learn from Kenia, who had been out drinking and was separated from her friends the night she was killed.
"We want to make young women aware that those dangers are still out there," Tony Lee said. "There's going to be another Kenia. I feel that very strongly in my heart that there will be another Kenia."
(KUSA-TV © 2011 Multimedia Holdings Corporation with The Associated Press)