Her attorney calls her Katy and insists Katherine Russell knew absolutely nothing about what her husband and his brother planned on doing at the Boston Marathon.

But a growing number of questions are being raised based on the circumstances that surrounded Tamerlan Tsarnaev's widow in the days and weeks before his death.

Investigators are trying "to figure out if she has knowledge of how he became radicalized, who he spoke to, how he may have learned to make the bomb and whether there are others out there who share his views," explains Ron Sullivan, director of Harvard's Criminal Justice Institute.

Now Breaking Celebrity News is taking a look at the most compelling issues around the bomber's widow.

* A copy of Inspire, the English language al Qaeda magazine, was found on her computer, causing investigators to "sharpen their focus" on Russell, The Washington Post reported.

* Russell's surviving brother-in-law Dzhokhar Tsarnaev