Case:             22-0220149      
 
Date:              Saturday, January 22, 2022
 
Time:             2:47 a.m.
 
Location:       400 block of E. 6^th St. (north alley)
 
Deceased:     Michael Martin O’Brien, White male, 05/18/1988
 
Arrested:       Donald Carrillo, White male, 24-years-old (pictured below) 
 
Update: On January 25, 2022, the Lonestar Fugitive Taskforce arrested Donald Carrillo on a 1^st Degree Murder warrant at an apartment in the 2200 Blk. of W. William Cannon. Carrillo was booked into the Travis County Jail on a $1,000,000 bond. 

Original Press Release: 
 
The Austin Police Department (APD) has identified Michael Martin O’Brien as the victim of the homicide in the 400 block of E. 6^th St.
 
On Saturday, January 22, 2022, at approximately 2:47 a.m., 9-1-1 received a call of a stabbing that had just occurred in the north alley of the 400 block of E. 6^th St. APD officers, along with Austin-Travis County EMS, arrived on the scene and discovered a man with life-threatening injuries. The victim was transported to a hospital where he succumbed to his injuries. At 10:20 a.m., Michael O’Brien was pronounced deceased by Dr. Dubose.
 
Homicide investigators and crime scene technicians responded to the scene to interview witnesses and process the scene. Through investigation, homicide detectives were advised that an altercation had broken out in the alley which led to the stabbing. Several witnesses saw a White man wearing a black jacket, blue jeans and a red baseball cap flee the scene prior to police arrival.   
 
On January 23, 2022, the Travis County Medical Examiner’s conducted an autopsy and determined the official cause of death as multiple stab wounds and the manner, homicide. 
 
Detectives are asking anyone with information or video of the incident to call APD Homicide at 512-974-TIPS, email homicide.apd@austintexas.gov, utilize the Crime Stoppers tip line at 512-472-8477 (TIPS), or the Crime Stoppers app. You may remain anonymous. Information leading to an arrest may be eligible for a reward of up to $1,000. You can also submit tips by downloading APD’s mobile app, Austin PD, free on iPhone and Android.

This is Austin's 4^th homicide of 2022