'She seemed like a nice girl,' said neighbour Frank Ferraro in the Boston suburb of Billerica.
Stephen, 26, is the younger daughter of hardworking Indian immigrants.
'They're quiet people,' Mr Ferraro said of Stephen's parents, Devaraj and Kunjunjamma Stephen, who work at a medical clinic. 'This is going to change their lives forever.'
Neighbour Kelli Kelley said: 'They seemed to work very, very hard to be part of the neighborhood.'
Kashif Parvaiz first appeared on the scene about three months ago, riding on a motorcycle.
Neighbours say they suspected the surly young man was no good.
'He didn't seem very friendly,' Mr Ferraro said.
Parvaiz and Stephen were charged with murder, conspiracy and weapons offences over Tuesday night's killing in Boonton, New Jersey.
On Friday it emerged that Nazish Noorani lived in fear of her abusive husband as their marriage crumbled and chillingly foretold of her fate to her brother.
In a text to him she wrote: 'I dont no wht to do. Cant talk to him cuz he abuse me than ... he doesnt wanna live with me ... i dont no kids get scared of him sometimes ... im so tired of this ... i dont no Im scared ...someday u will find me dead because its cuz of kaski ... he wants to kill me.'
Parvaiz, 26, has been charged after admitting he was involved in the killing. Read More