Dzhokar Tsarnaev

Boston Marathon bombing suspect Dzhokahar Tsarnaev – the man in the picture above this story – was arrested Friday night, after an intense manhunt that lasted nearly 24 hours.

Police say they found him hiding in a boat in a backyard in Watertown, Massachusetts, just outside Boston.

On Monday, Tsarnaev remained at a Boston hospital in serious condition, suffering from gunshot wounds, including one that might have been self-inflicted.

(“Self-inflicted” means he might have shot himself.)

Investigators say that Tsarnaev and his older brother, Tamerlan Tsarnaev, are the men who killed three marathon spectators last Monday, including 8-year-old Martin Richard.

They’re also accused of killing Sean Collier, a police officer at the Massachusetts Institute of Technology, late Thursday night.

Tamerlan Tsarnaev was killed a short time after that, during the manhunt for the two brothers.

Last Monday’s explosions also injured at least 176 people, according to published reports.

Several dozen of those people remained hospitalized as of Sunday.

Late Sunday, investigators said that they’d begun questioning Dzhokar Tsarnaev about bombings.

They want to know why he and his brother allegedly did what they did – and if anyone helped them, either in this country of overseas.

Tsarnaev was reportedly responding to writing, because he was too badly wounded to speak.

But as of Sunday night, there was no word on what information he was revealing – if any.

Investigators – and a number of politicians – are also asking for more information about Tamerlan Tsarnaev’s six-month trip to Russia last year.

According to Reuters new service, the FBI interviewed Tamerlan Tsarnaev in 2011, after Russian officials expressed concerns about him.

But according to media reports, federal agents found no indication at the time that the Tsarnaevs were terrorists.

The Tsarnaev family is originally from Chechnya – a predominantly Muslim region of Russia.

Chechnya has been involved in a long and bloody struggle for independence from Russia

But the Chechen rebels have not been known to be anti-American, according to experts.

So it’s not yet clear who – if anyone – might have influenced or helped Tamerlan Tsarnaev while he was overseas.

On NBC’s “Meet the Press” Sunday morning, Massachusetts Governor Deval Patrick said there was no reason to worry that someone else was plotting more attacks.

“There is no basis for concern about another imminent threat,” he said.

Over the weekend, most people in the Boston area tried to get back to their normal lives.

But for some, the grieving continues.

Funeral services were scheduled Monday for Kyrstal Campbell – another of the bombing victims.

At 2:50 Monday afternoon, everyone was asked to pause for a moment of silence.

On Sunday, Boston’s Roman Catholic leader – Cardinal Sean O’Malley – warned against using the bombings as an excuse to retaliate against innocent Muslims.

“We must be people of reconciliation,” he said during services at Boston’s Cathedral of the Holy Cross, “not people of revenge.”