York Regional Police have released video of a suspect, they say, smashed a beer bottle into a man's face.
The incident happened back in October, outside a bar in Newmarket.
Police were called to the bar near Davis Drive and Main Street for a fight and say officers found a 51-year-old man with serious injuries.
The suspect fled.
Anyone with information is asked to contact the #1 District Criminal Investigations Bureau at 1-866-876-5423, ext.7141, Crime Stoppers at 1-800-222-TIPS, leave an anonymous tip online at www.1800222tips.com, or text your tip to CRIMES (274637) starting with the word YORK.