Details released in highway murder-suicide

Details released in highway murder-suicide. Photo Courtesy: Ionia County Sheriff's Office

IONIA COUNTY, Mich., (WPBN/WGTU) -- The Ionia County Sheriff's Office has released more information from its investigation into the murder-suicide that killed a Manistee County couple earlier this month.

David and Lisa Somers, both 51 and from Kaleva, were found on the side of I-96 near Nash Highway in Boston Township on January 6.

Lisa's daughter, Amedy Dewey, 18, was severely hurt in the shooting.

Sheriff's detectives were able to meet with Amedy during the investigation to find out what happened.

According to detectives, David picked up Lisa and Amedy from the Gerald R. Ford International Airport in Grand Rapids after the women returned from a cruise vacation.

Records show David was booked to go on the cruise with the pair but opted out the day before they were set to leave.

Investigators say the group was in the car about 20 to 30 minutes before the shooting and was headed to Midland where Amedy was staying with a friend.

Ionia County Sheriff Dale Miller says David and Lisa got into an argument before the shooting. Records show Lisa accused David of being unfaithful in their marriage.

The couple was said to be arguing over the phone and in text messages prior to Lisa and Amedy taking the flight from Florida to Michigan.

According to the sheriff's office, neither Lisa nor Amedy knew that there was a shotgun in the back of the family's 2011 Chevrolet Equinox.

While driving on I-96 the argument between David and Lisa escalated, which caused David to become angry and begin driving erratically on the freeway and travel at excessive speeds for the road conditions, according to Miller.

Records show that the erratic driving was reported by multiple witnesses who contacted the Sheriff's Office days after the incident.

Miller says David then became extremely angry and suddenly slowed the vehicle and pulled it off the roadway coming to a stop, getting out of the vehicle and walking to the back of the car. Amedy told detectives both her and her mother got out of the car and she heard Lisa yell, "He's got a gun!"

Amedy says she immediately got back into the car and tried to lay across the backseat to hide from David. She says she was trying to call 911 on her phone but was unsuccessful before David shot her. She told detectives she looked back over her shoulder just before she was shot and it took her a moment to realize what had happened to her.

Investigators say the single shot came from a 12-gauge slug. Dewey was struck in the face and head. Investigators say the shot came from the back of the car through the opened liftgate.

Amedy told detectives that her immediate instinct was, “I’m not going to die. This is not how I’m going to die!”

Detectives say Amedy described the steps she took to save her own life, which included trying to call 911, climbing over the front seat to use the horn and lights on the car and even getting out at one point to try and flag down passing motorists. Witnesses calling 911 that evening reported seeing someone at the back of the car looking like they were trying to flag down cars.

Investigators say David then shot Lisa once before turning the gun on himself. The 12-gauge shotgun was found underneath David's body at the scene.

The Ionia County Sheriff's Office is still awaiting the results of the toxicology reports to know if David was under the influence of alcohol or drugs at the time of the shooting.

Miller says underlying domestic issues and accusation of infidelity were determined to be significant contributing factors.

Investigators have also learned that David was reportedly being treated for a brain mass or a brain tumor which may have also contributed to the shooting.

The case is still open at this time.

Detectives said they left their meeting with Amedy Dewey with a tremendous amount of respect for the courage, tenacity, and strength she has displayed both during and after this ordeal as she continues to recover from this terrible incident.

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