Ferrell appeared in court Thursday afternoon to face a charge of murder of a US government employee who was performing his duties.
"On behalf of the U.S. Postal Inspection Service, I would like to extend our deepest sympathy to the Mosby family for the tragic loss of their loved one", said Thomas Noyes, inspector in charge of the Fort Worth Division.
"With this arrest, we take a crucial step towards ensuring that the person allegedly responsible for this senseless murder is brought to justice", added USA attorney Nealy Cox. Ferrell is slated to appear in Federal Court today.
The suspect has been identified as 25 year old Donnie Ferrell.
Ferrell's arrest is linked to Monday's early morning fatal shooting of 58 year old USPS truck driver Tony Mosby, who died after being shot in his truck while driving along eastbound I-30. When police arrived they found him dead inside the cab of his postal truck that had crashed into a guardrail. They said they had seen sparks flying and the truck swerve and asked Ferrell why he had shot.
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They told the 500 students and parents waiting for them that they were fighting to protect all students. Rick Scott would go along with the bill.
Police haven't said what they believe led to the shooting or if Mosby was targeted or randomly attacked.
The two said they had met up with Ferrell and another person for dinner at a Dallas restaurant before drinking alcohol together at a pool hall.
Monday night the U.S. Postal Service said it was offering up to a $50,000 reward regarding this case.
Investigators say Mosby was driving the rig, known as a box truck, when he was shot.
The charge carries a sentence of up to life in prison and a $250,000 fine.