In September, 1963, Frazier began work at the Texas School Book Depository in Dallas. The following month, Ruth Paine, a neighbour of Linnie Mae Randle, told her that Lee Harvey Oswald was going to work at the same building. The two men became friends and Frazier agreed to give Oswald a lift to work when he was staying at Paine's house in Irving.
On 22nd November, 1963, Frazier gave Oswald a lift to the Texas Book Depository. He told the Warren Commission that Oswald took a package into work that day that he claimed contained curtain rods. In his book The Kennedy Conspiracy, the author, Anthony Summers, points out: "Ironically, it was Frazier and his sister who created a slight doubt that Oswald had, in fact, been carrying the murder weapon rather than his "curtain rods." Both insisted Oswald's parcel was a good eight inches shorter than the disassembled Mannlicher-Carcano. Frazier demonstrated this by showing that Oswald could not physically have carried a 35-inch rifle tucked into his armpit with the base cupped in his hand, as Frazier remembered."
Only Jack Dougherty saw Oswald enter the Texas Book Depository on 22nd November, 1963. However, he told the Warren Commission that Oswald was not carrying "anything in his hands" when he arrived that morning.
Garland G. Slack, who also testified before the Warren Commission, claimed that he saw Oswald practicing with a rifle at a firing range on 10th November, 1963. He added that Oswald had been driven to the driving range by "a man named Frazier from Irving".
It has also been pointed out that one of Frazier's friends was a man named John M. Crawford. He in turn, was an associate of Jack Ruby.