(CNN) -- Timothy Jones Jr. allegedly went on a 700-mile journey that began in South Carolina with the bodies of his five young children wrapped in garbage bags in the back of his SUV, authorities said Wednesday. 

Jones, a 32-year-old computer tech and Mississippi State University graduate, told neighbors last week that he was moving his children from their home near Lexington to another state. 

The father of five was being held Wednesday in a Mississippi jail in connection with the deaths of his children, ages 1 to 8, whose bodies were dumped in Alabama. 

It's still unclear how or why Jones allegedly killed his children, but acting Sheriff Lewis McCarty of Lexington County told reporters that Jones drove for several days with their decomposing bodies in the back of his SUV. 

It is believed he killed the children at the same time, and that the crime happened in Lexington County, McCarty said. 

"I don't understand why he did it but, yes, these children were in the car, deceased, in garbage bags for some period of time," McCarty said. 

When Jones was picked up Saturday at a police checkpoint in Mississippi, he seemed "very strange, maybe somewhat disoriented, a little bit on the violent side," McCarty said. In the car, police later found "cleaning material, they saw blood, they saw children's clothing but no children." 

McCarty said Jones, who allegedly was in possession of synthetic marijuana and a drug called "bath salts," faces five counts of murder when he's returned to South Carolina. 
What were the bodies wrapped in
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garbage bags
bodies of his five young children wrapped in garbage bags
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the bodies of his five young children
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Timothy Jones Jr. allegedly went on a 700-mile journey
Timothy Jones Jr.
Timothy Jones Jr. allegedly went
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 journey that began in South Carolina
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in the back of his SUV
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Jones, a 32-year-old computer tech
computer tech
Jones, a 32-year-old computer tech
Mississippi State University
Jones, a 32-year-old computer tech and Mississippi State University graduate
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McCarty said Jones, who allegedly was in possession of synthetic marijuana and a drug called "bath salts," faces five counts of murder when he's returned to South Carolina.
Mississippi

When Jones was picked up Saturday at a police checkpoint in Mississipp
Alabama
 whose bodies were dumped in Alabama. 

1 to 8
 the deaths of his children, ages 1 to 8, whose bodies were dumped in Alabama. 
Lexington County
It is believed he killed the children at the same time, and that the crime happened in Lexington County
McCarty
It is believed he killed the children at the same time, and that the crime happened in Lexington County, McCarty said. 

acting Sheriff
acting Sheriff Lewis McCarty of Lexington County
Lexington County
acting Sheriff Lewis McCarty of Lexington County
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When Jones was picked up Saturday
a police checkpoint
When Jones was picked up Saturday at a police checkpoint in Mississippi
Mississippi
When Jones was picked up Saturday at a police checkpoint in Mississippi,