The shooter/family turned him in. He was not captured by LE or anyone else.
Totally turned himself in.
"The father recognized his 22-year-old son from
photos of the suspected shooter that were released by authorities Thursday, leading the parent to confront his son when he returned home, sources said." The dad tuned him in.
But of course the police had nothing to do with it - those surveillance photos just appeared out of thin air.
I like you SF so I'll refrain from commenting any further.