Omar Orozio-Machado, 36, was fatally shot on February 28, 2015, in Houston during an altercation near the city’s Northside. Police say the killing was connected to a robbery gone wrong; assailants fled before officers arrived. Machado was found with multiple gunshot wounds and was pronounced dead at the scene after emergency responders attempted resuscitation.

The case is listed among several unsolved homicides Crime Stoppers of Houston and the Houston Police Department have publicized. Investigators say the probe has been hampered by a lack of witnesses and clear leads. Following the killing, police increased patrols in the mostly residential, previously described-as-peaceful neighborhood and worked with community leaders; authorities have offered a reward for information that leads to an arrest. If anyone has information about that February 28, 2015 robbery or the people involved, please contact the Houston Police Department or Crime Stoppers of Houston.