DENVER Police in Denver are investigating a homicide after a man died from injuries sustained in a violent attack in downtown Saturday.A suspect identified as Edgardo Jimenez-Alvarad, 30 was arrested and is now facing murder charges.According to a probable cause affidavit, a witness told 911 dispatchers that they saw the suspect repeatedly stomp on an apparently unresponsive man before lifting a large rock and throwing it onto the victim's head.The assault occurred in the 1300 block of Larimer Street, in a grassy area near the intersection of Speer Boulevard, according to police.Officers were called to the scene around 6:30 p.m., and found the victim unconscious. He was transported to the hospital, where he was later pronounced deceased.Police have not released the victim's identity.Moments later, after a witness provided a detailed description of the suspect to police, officers took the 30-year-old man into custody near the area of 14th and Champa streets.During a formal interview, the witness told detectives there was no apparent verbal or physical altercation before the assault and that the victim never moved during the attack.Investigators recovered a large rock that is believed to have been used in the attack.Police said Jimenez-Alvarad was booked into the Denver County Jail on suspicion of first-degree murder. ...read more read less