UNSOLVED CASES: Who killed Sonia Mejia?

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Updated: 10/26 9:56 am

TAYLORSVILLE, Utah (ABC 4 News) – A mother and her unborn child, brutally murdered by an intruder who forced his way into her home. Police scoured the city of Taylorsville and beyond. The killer got away.
Four years later, authorities have everything they need to prosecute the suspect, except his name.
The evidence in this case suggests the victim, Sonia Mejia, did not know her attacker, but that he might have known her, that he watched her, perhaps even followed her. When he found out where she lived, the man came to her home in February of 2006 and knocked on her door.
It was the middle of the day. A man described as Latino, medium height and build, wearing shorts and a white tee shirt, spoke to Sonia. A witness says the discussion appeared to become heated. Police say when she tried to close the door, he forced his way inside.
“Her husband came home from work that day and found her inside their bedroom, deceased," says Taylorsville Police Detective Mike Ikemiyashiro.”
Detectives arrived on scene that evening and immediately discovered the 29 year old wife and mother of an eight year-old boy was not the only one killed.
"She was pregnant, we believe between five to six months," says Ikemiyashiro.
The attacker not only ended Sonia’s life but also the life of her unborn child, entering it’s third trimester, considered to be a viable baby and considered to be a murder victim. Detectives say it was a calculated killing.
“Whether it was an attraction or whether she fit the profile that he liked, he definitely watched the woman and knew some of her mannerisms and her schedule," says Ikemiyashiro.
What happened in 2006 was only the beginning. There would be more murder. The evidence shows the man who killed Sonia Mejia found another victim. Exactly two years later, another homicide in West Valley City. Investigators found DNA at the scene that matched the samples collected in Sonia’s apartment.
"We know this guy’s killed once and he’s killed again,” says Taylorsville Police Sergeant Vaughn Allen. “In these types of crimes these suspects don’t stop. They continue on killing so we need to find this guy at all cost. He is a definite threat to society."
Police have a "John Doe" warrant for the suspect’s arrest, based on his DNA identity. Now, all they need is his name. Police say they believe someone knows who he is.

To take action and share any information you may have on who killed Sonia Mejia, you can contact Detective Mike Ikemiyashiro by telephone at:
(801) 955-2084
You can also contact him via e-mail, at:

You can remain anonymous as you help find justice for a young wife and mother who lost her life and find a man who is being identified as a serial killer and who may still be on the loose.

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