The father said he last spoke to his son around 2:30 p.m. Saturday before he left to visit friends.
"We were just talking small talk about TV shows," he recalled. "It was just causal talk."
Beckman said he later watched his son leave on a skateboard.
"I was just looking out the window, he was rising a skateboard down the street, heading to his friend's house," the elder Beckman said.
He said friends, family and fellow members of Mountain Christian Church in Joppa had been stopping by all day, bringing food and giving their support.
He described the reported actions of his son leading up to the shooting Saturday night as out of character, though.
"Right now, I'll give the benefit of the doubt to the police officer until the evidence shows that we may have to look at another direction," he said.
He his son had struggled with his depression in recent months and had been hanging around the "wrong places."
He also described his son as quiet, popular and a great listener. He said his son had played football since the age of 5 and a half, but rugby was his favorite sport.
"He would punish you on the field and love you off the field," Glenn Beckman said. "He knew when to turn it off."
"He had a following of kids," the father said. "He was just making them laugh."
According to the family, viewings for Mr. Beckman, who is also survived by an older sister, Brittany, will Friday 2 to 4 and 7 to 9 p.m. Friday at Evans Funeral Chapel, 3 Newport Drive in Forest Hill.
The funeral service will be Saturday at 1 p.m. at Mountain Christian Church, 1824 Mountain Road in Joppa.
'Aloof and confused'
Mr. Beckman's friend, Dupree, said after the shooting that Beckman, whom he had not seen for about a year, looked "really just aloof and confused" when he came into the McDonald's.
He said Beckman greeted him and ordered food, but did not eat it.
"He said, 'What's up Eric?' " Dupree recalled.
Dupree said Beckman left the McDonald's, and shortly after his departure, Dupree and his friends in the restaurant saw a quickly-growing number of police cars enter the lot of the BP station.
"I saw it escalate from the beginning," Dupree said of the law enforcement presence.
He said he did not hear any gunshots, though.
"He's a close friend of a close friend," Dupree said of Beckman. "That's why it's sort of shaken me up."