Lyne was reported missing after going on a date to the Seattle Mariners baseball game on Friday with a man she met online, according to NBC News.
Homicide detectives and the King County Medical Examiner's Office confirmed the remains were human, Michaud said.
O'Toole said police arrested Charlton on Monday morning in Snohomish County.
As The Daily Beast previously reported, a Seattle man returning home from a trip made the gruesome discovery Saturday around 4 p.m.
Three body parts found Saturday in a homeowner's recycling bin in Seattle's Central District have been identified as those of a Renton woman reported as missing by friends.
Seattle Police is now asking for the public's help to find Lyne's missing vehicle, a silver 2015 Toyota Highlander with the Washington license plate AUW3230.
Police said the human remains were packaged inside plastic bags and dumped in the bin.
The body parts have been tentatively identified as a person reported missing in the nearby suburb of Renton, police said.
Police were out in her neighborhood investigating all weekend, according to neighbors.
"I've never seen anything like it", Renner said.
The last time neighbors say they saw Lyne was at her mailbox Friday before she headed out for her date with Charlton.
Held. John Charlton was on a date with Ingrid Lyne the night she died and is now behind bars. "It's a pretty quiet neighborhood and a pretty quiet cul-de-sac so it was a little weird to see all the police activity", neighbor Dawn Early said.
A spokesperson for Swedish said Seattle Police alerted them to the situation and they are concerned. The homeowner told police he put out his recycling bin on Friday.