An 18-year-old student who opened fire during a fight and injured four people on Wednesday has been taken into custody, authorities told The Associated Press. Officials have identified a suspect involved in the shooting as Timothy George Simpkins, 18. He’s accused of opening fire at the Timberview High School on Wednesday morning in Arlington, a Dallas-area suburb. “We currently have multiple agencies, including the U.S. Marshals’ task force that is looking for this individual. Again, this is a collaborative effort between state, local, and federal agencies to bring this person to justice,” Arlington Police Assistant Chief Kevin Kolbye said at a news conference. — Earlier update: “We are on scene at a shooting at Timberview High School,” said the Arlington Police Department in its initial Twitter post. “We are doing a methodical search and working closely with” the Bureau of Alcohol, Tobacco, and Firearms (ATF) and other local law enforcement …