A cached profile photo that matches his picture, and tweets from other users he's interacted with suggest that this is the twitter account of 19-year-old Dzhokhar A. Tsarnaev, the fugitive suspect #2 in the Boston Marathon bombings: @J_tsar. The account is listed under the name "Jahar," which is what classmates called him because his full name was hard to pronounce.

Surprisingly, Tsarnaev has been active on Twitter since the bombing. His last tweet was on Wednesday, two days after he is alleged to have helped carry out the Marathon bombing:

The day of the bombing itself, Tsarnaev tweeted:

("Ain't no love in the heart of the city" is a Jay-Z lyric)

Last year he tweeted:

(Update: This is a lyric from a Kanye West song.)

But there is not much on the account that suggests the user of the account was be anything but a normal 19-year-old kid.

He tweeted about Chechnya, where he was born (his family moved to the U.S. in 2002):

He tweeted about music:

and random stuff:

He was also apparently a 9/11 truther:

On twitter, friends he interacted with are expressing shock that he's a suspect.

Especially given his, um, laid-back reputation:

And his friends are now experiencing the inevitable wave of reporters and online gawkers now that the twitter account has been discovered:

Update: BuzzFeed confirms with a high school classmate of Tsarnaev that this is his twitter account.

"I would confirm this as to being his twitter account. Those users went to my high school," said Stefanie Gardner, of the Rindge Class of 2011.