As seem from the platform the man could have taken out the gun and shot the victim, even thought at the time of the death it seemed to you on the train that he was still reading.

从站台上看，这个人可能已经拿出了枪，射杀了被害者，而在他死的时候，在火车上的你看起来，他甚至还在看报纸。

youdao

I was reading and heard this shot and came running. And there was the gun lying on the ground.

我当时正在看书，听到枪声就跑出来了，然后看到那把枪在地板上。

youdao

Relatives of some victims were at the Capitol pressing lawmakers to back gun restrictions, and were holding a vigil outside the building where they were reading the names of recent victims of gun violence.

NPR: Senate Ready To Launch Gun Control Debate

My company actually posted a blog post on our website regarding this exact subject and the Gun Policy, per my request after reading this article at Forbes.

FORBES: Our Christmas Gift From Washington: Recession and Unemployment

Officers discovered an alleged gun factory in sheds at The Briars on Basingstoke Road, Three Mile Cross, near Reading, after the tenants at the property raised the alarm last July.

BBC: Guns 'bought for James Bond film'