A 21-year-old man who was the first to open fire during a deadly shooting at a Danzig Street block party in 2012 has been convicted of second-degree murder.

He is the second person to be convicted in the shooting.

The convicted man was 17-years-old at the time of the shooting and can't be named under the Youth Criminal Justice Act. 

The jury began deliberations on Monday before reaching a verdict today.

Two were killed and more than 20 were wounded when gunfire erupted at the July 16, 2012, party in a Scarborough neighbourhood where more than 100 people had gathered.

Staff Insp. Greg McLean said the man was prevented from attending the party, due to perceived gang connections, before he began shooting.

Police say they are still looking for one more person whom they believe is responsible for the death of 14-year-old Shyanne Charles, one of two innocent people killed that night.

The man is due back in court on May 6.

McLean said it's unclear whether or not the Crown will argue for the man to be sentenced as an adult. 

Shootout killed innocent bystanders

The gunfire killed Charles and 23-year-old Joshua Yasay.

In spring of 2014, Nahom Tsegazab, the first person convicted in the shooting, pleaded guilty to two counts of manslaughter and six counts of aggravated assault.

He was sentenced to 14 years, although the sentence was reduced to 11 years and five months due to time served.