Police are still sorting out what really happened inside a home in western Pennsylvania on Monday night, but the disturbing details are beginning to emerge as police continue to question the main suspect in the fatal shooting - the victim's wife.

According to TribLive.com, 38-year-old Teresa Drum of Frazer, Allegheny County, first claimed her husband shot himself during the time she called 911 amid an alcohol-fueled argument over the fact that she had drunk his last beer.

But before she made the 911 call at around 10:30 p.m., police say the husband, Dennis Drum Sr., 42, was already shot dead, a bullet in his forehead in a bedroom, TribLive.com reports.

And Teresa Drum is accused of texting a picture of his dead body to a friend, then taking a shower to "rinse off" before dialing 911.

Later under questioning, Teresa Drum allegedly told detectives she and her husband had been fighting about a casserole she burned that night, leading to a storm of insults and cursing, TribLive.com reports, adding:

She said her husband was sitting on the edge of the bed and she was standing over him when he pulled the gun from a holster. She said she put her finger on the gun's trigger, along with his, and it went off.

She also admitted to drinking seven beers since 5 p.m. that night.

Background from TribLive.com:

Dennis Drum was found lying in a fetal position, a gun in his right hand and a bullet in his forehead.

Teresa Drum showed paramedics her cellphone and produced a picture she had taken at 10:20 p.m. of her husband lying as first responders had found him.

Teresa Drum said she took the picture because she didn't know what to do, court documents state. She sent the picture to a friend, who told her to call 911.

Police said that, in the picture taken 11 minutes before the 911 call, no gun can be seen around Dennis Drum or in his right hand.

Teresa Drum is charged with criminal homicide.

At last report, she was being held in the Allegheny County Jail without bail.

The couple's two children, who were in the house at the time of the shooting, are now with other family. Their ages were not immediately released.