TODAY | January 29, 2013
>>> we're back now at 7:40 with new questions in the death of mindy mccready 's boyfriend. did he take his life earlier this month or was he murdered? in little rock , arkansas , andrea canning is in little rock , arkansas .
>> mindy mccready says she just wants to be able to grieve properly but says the sheriff is on a witch hunt . the sheriff says he just wants to keep the case open until more forensic testing can be done.
>> he didn't just -- he didn't just touch my heart. he touched my soul. he was my soul mate .
>> reporter: mindy mccready 's life will never be the same after she says her boyfriend, david wilson , took his own life on the front porch of their arkansas lake house .
>> i've never gone through anything this painful. nor will i ever again go through anything this painful.
>> reporter: the couple fell in love over music. he was a producer and she was once on top of the country charts with songs like " guys do it all the time guys do it all the time
>> reporter: her early success was followed by a downward spiral of addiction, arrest and jail time. she made headlines again in 2011 , after going on the run with her son, xander, in the mid midst of a custody battle. then everything changed the night of january 13th .
>> i started screaming, calling 911. i laid down next to him. i just pleaded with him not to die.
>> reporter: was he able to say anything? was he able to see you? were his eyes open ?
>> he was responding.
>> with words or with a touch?
>> reporter: initially, law enforcement officials only said they had responded to a report of a suicide. the local sheriff now tells nbc news the investigation into the cause of death is ongoing and murder has not been ruled out. mccready is not a suspect. she admits they did argue that night about personal issues. there have been reports out there that david was having an affair.
>> david was not having an affair with another woman. that is absolutely, totally untrue.
>> reporter: a published report has raised questions about the shooting, including why the bullet wasn't found until a day later.
>> i didn't find it. the dog did. it was in the dog's mouth. i mean, that's a horrific thing to say, but it was in the dog's mouth.
>> reporter: for the record, did you kill david ? did you shoot david ?
>> oh, my god! no. oh, my god, no! he was my life. we were each other's life.
>> reporter: do you, 100% believe that david killed himself?
>> i -- i don't know.
>> do you think he could have been murdered?
>> i don't know.
>> reporter: you have been through so much pain and heartache in your life and, honestly, your life almost plays like a country music song.
>> i just keep telling myself that the more suffering that i go through, the greater character i'll have.
>> reporter: once again we want to say mindy mccready is not a suspect in this case. there are no suspects in this case at this time. tests from the arkansas crime lab are due back in a couple of weeks. the sheriff says he will be able to make a determination at that point if this is murder or suicide. matt?
>> you'll be following this story for "dateline." by the way, you can catch a special edition of "dateline" 10:00 , 9:00 central time here on nbc.