A man charged with felony driving under the influence in the Saturday wreck that killed a Johns Island teen spent the night before mourning the death of a friend who died in a plane crash last week.

James Bryson Munn, 20, of Blaine Court in West Ashley, was "best friends" with Matt Gaither, according to Gaither's father, Cole, and Munn's lawyer, Jack Sinclaire.

Matt Gaither, 20, is the Johns Island student pilot who died in a plane crash in Mount Pleasant on Thursday with his flight instructor, Graham Borland, 33, of North Charleston.

Both Gaither and Munn were 2012 graduates of James Island Charter High School. Munn studied aircraft technology at Trident Tech.

Munn attended a gathering Friday at the Gaithers' home in memory of his friend.

"He was asleep on my couch when I woke up and he slept on the couch until at least 12 o'clock," said Cole Gaither Monday.

He said he did not believe Munn had been drinking.

"Nobody was really drinking that much. It was not a party; it was a wake, and no one remembers him drinking excessively at all or really (drinking) at all."

Sinclaire also denied that he was under the influence.

"We are firmly convinced that in the end, the evidence will show that Bryson was not under the influence of drugs or alcohol at the time of this tragic accident," Sinclaire said.

Munn is also charged with being a minor in possession of beer or alcohol, according to Charleston County Sheriff's Deputies.

Kylie Gillette, 17, of Johns Island, would have started her senior year Monday at James Island Charter High School, where she was ranked number three in her class, according to her obituary.

A celebration of her life is set for 2 p.m. Wednesday at Ashley River Baptist Church.

Gillette died at the scene of the wreck around 12:30 p.m. Saturday near the intersection of River and Main roads, authorities said.

An incident report released Monday said Munn was seen speeding past multiple cars in a 2006 Chevy Equinox shortly before the vehicle ran off the right side of the road.

The vehicle then overcorrected, crossing the centerline and striking Gillette's 2011 Jeep Compass head on, the report said.

Munn was transported to Medical University Hospital, where officers who met with him reported he had bloodshot, watery eyes and slurred speech, according to the report.

He has a broken left kneecap, twisted right ankle and lacerations on his left arm, hand and leg, Sinclaire said.

Munn's bond hearing was held in the hospital on Monday, according to the lawyer. Bail was set at $100,475.

The case is still under investigation.

Reach Brenda Rindge at 937-5713 or @brindge on Twitter. Christina Elmore contributed to this report.