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>> reporter: you wouldn't think. but in fact, that was something chanin's children did worry about a lot. >> i'm sure you know "dateline nbc" and then "to catch a predator," right? i've seen that. that's where weirdos go on the internet. we were afraid she was going to meet this one weirdo on the internet. >> reporter: now those sons were eager for investigators to find their mother's killer and detectives were chasing down a new lead in connection with chanin's internet dating. >> there's a murder investigation, there's no stone unturned. >> reporter: hiding under one particular rock was one ...

Herself in danger or harm's way whatsoever. >> reporter: you wouldn't think. but in fact, that was something chanin's children did worry about a lot. >> i'm sure you know "dateline nbc" and then "to catch a predator," right? i've seen that. that's where weirdos go on the internet. we were afraid she was going to meet this one weirdo on the internet. >> reporter: now those sons were eager for investigators to find their mother's killer and detectives were chasing down a new lead in connection with chanin's internet dating. >> there's a murder investigation, there's no stone unturned. >> reporte...

Assault, physical assault, emotional abuse. this friday never before heard allegations. a dateline nbc interview you don't want to miss. coming up. teline nbc interview u don't want to miss coming up. ♪ hey, saved you a seat.

Big talker today. rapper meek mill was released from prison tuesday evening. dateline nbc got the exclusive photo the photo immediately after he got out. the immediate release of the hip-hop star after spending five months in jail for probation violations for conviction on drug and firearms. the probation violation, popping a wheelie at an airport. both charges were dismissed but still found in violation. and for those violations, meek mill was sentenced to four years behind bars. last week, the philadelphia district attorney's office said charges should be vacated over questions of credibilit...

We learned today president obama will hold last press briefing next wednesday. it will happen sometime in the afternoon. meanwhile, lester hotel for a special presentation. dateline nbc coming up tonight. we'll be right back.