Reports: Katherine Russell no longer cooperating with police

Updated:

(MyFoxBoston.com) – Tamerlan Tsarnaev's widow, Katherine Russell, has stopped cooperating with police, the New York Times reports.

The newspaper claims Tamerlan Tsarnaev called his wife right after the FBI released surveillance pictures of the brothers. The report says, right now, only Russell knows what they talked about.
    
This week, the federal investigators collected a DNA sample from Russell, but the New York Times says Russell's DNA does not match the DNA on the bombs.

Her lawyer says Russell denies any involvement in the bomb plot.

Tsarnaev was killed on April 18 following a shoot out with police in an East Watertown neighborhood. Investigators say his younger brother drove over him while trying to flee the scene. Dzhokhar Tsarnaev was captured on April 19 after he was found hiding in a boat in a Franklin Street back yard.

Tsarnaev's cause of death could be released as early as Friday. The state medical examiner's office will go public with that information once the funeral home files a death certificate.