Who was Junior Cee Niko Semo? One of Seattle Center mass shooters ID'd, was among 3 killed

Junior Cee Niko Semo, 19, was identified as one of the three people killed and one of the shooters in the Seattle Center shooting at the Bite of Seattle food festival.

Semo opened fire alongside at least two others; a 15-year-old suspect was arrested and another gunman is being sought.

The other two killed were Carlos Israel Sanchez Villalba, 44, and Ashley Whitehead, 56, all from Seattle.

Semo died from multiple gunshot wounds; a police report indicates Semo and the 15-year-old suspect exchanged gunfire.

Four others were wounded, including a two-year-old boy; a 27-year-old man later reported minor injuries.