John Hinckley, who shot Reagan in 1981 to impress actress Jodie Foster, was found not guilty by reason of insanity in the assassination attempt.
He has been held for the last three decades at a Washington psychiatric hospital, but has been granted increasing freedom in recent years as doctors say his mental illness has been in remission.
An ongoing hearing in Washington’s federal court is determining whether Hinckley, 56, can begin visiting his mother in Virginia for stretches of approximately three weeks at a time, with an eventual transition to living outside the mental hospital full-time. The hearing has spanned years.
The testimony from two Secret Service agents and a bookshop worker was aimed at supporting the US federal government’s case that such extended visits are premature and that Hinckley remains deceptive and potentially dangerous to the community.
One agent, Jason Clinkner, said Hinckley appeared “fixated” during an October visit to a Barnes & Noble store in Williamsburg, Virginia, where his mother lives, on a bookshelf of American history books — including titles on Reagan’s dispute with striking air traffic controllers and the assassination of President William McKinley in 1901.
Clinkner, who was observing Hinckley during one of his periodic visits with his mother, said he could not tell whether any particular book caught Hinckley’s attention.
But he said Hinckley’s interest in the books, though a matter of 15 to 20 seconds, gave him “goose bumps” and was alarming.
“When an attempted assassin looks at a book with the cover of a person he tried to kill, it’s of great concern,” Clinker said.
Hinckley, dressed in a blazer and buttoned-down shirt, sat impassively through the hearing, occasionally whispering to his lawyers.
Government lawyers have argued throughout the hearing that Hinckley is deceptive and dishonest.
Last July, they say, he visited the bookshop instead of going to see a film as he was supposed to.
Secret Service agents watched as he approached the cinema’s ticket window, then observed him browsing books on Reagan and presidential assassinations.
Before his mother came to pick him up, he returned to the theatre and waited in the lobby as if he had seen the film. His lawyer, Barry Levine, suggested he was merely trying to stay out of the heat.
Levine cast doubt on the significance of the agents’ observations.
He noted that the bookcase where Hinckley paused contained books on subjects as varied as Mormonism and the 9/11 terror attacks, that he browsed through books on totally unrelated subjects on other visits to the shop and that the merchandise he ultimately bought — books on Elvis Presley and Bob Dylan, for instance — were innocuous.
When Clinkner said he had been instructed to check whether Hinckley was wearing a ring and whether he spoke with people inside the bookshop, Levine mocked the directives as pointless.
An employee of the bookstore, Richard Rolfes, testified that a man he concluded was Hinckley entered the store in the late summer or early autumn and asked if there were any new books on the assassination of President John F Kennedy.
Reagan recovered from the shooting and went on to serve two terms as president. He died in 2004 at the age of 93.