More details regarding Brad Delp's suicide have been released:

ATKINSON, N.H. --Brad Delp, the lead singer for the band Boston who killed himself last week, left behind a note in which he called himself "a lonely soul," according to police reports released Thursday.

Toxicology tests by the state medical examiner's office showed that Delp committed suicide by carbon monoxide poisoning. Police said Delp had sealed himself inside a bathroom with two charcoal grills sometime between 11:30 p.m. March 8 and the next afternoon, when he was found by fiancee Pamela Sullivan.

Sullivan told police that Delp "had been depressed for some time, feeling emotional (and) bad about himself," according to the reports.

He was found on the floor of the bathroom, his head on a pillow and a note paper-clipped to the neck of his shirt.

"Mr. Brad Delp. J'ai une ame solitaire. I am a lonely soul," it read.

Sullivan called police after noticing a dryer vent tube connected to the exhaust pipe of Delp's car. In the garage, police found a note taped to the door leading into the house.

"To whoever finds this I have hopefully committed suicide. Plan B was to asphyxiate myself in my car."

In a third note on a door at the top of the stairs, Delp cautioned that there was carbon monoxide inside.

"I take complete and sole responsibility for my present situation. I have lost my desire to live," he wrote. The note also included instructions on how to contact his fiancee. There was a picture of Delp and Sullivan in the bathroom.

"Unfortunately she is totally unaware of what I have done," the note said.

The notes also said the couple's cat, Floppy, should be in a room that was safe from the deadly gas and asked that someone find her and make sure she was all right.

Police later found four sealed letters in an office addressed to Sullivan, his children, their mother, Micki Delp, and another couple whose identity was not disclosed. Police Lt. William Baldwin said police gave the letters to family members without reading them.

Outside the bathroom, police found a carbon monoxide detector with the battery removed.

Delp joined Boston in the mid-1970s and sang two of its biggest hits, "More than a Feeling" and "Long Time."

He had planned to marry Sullivan this summer during a break in a tour with Boston. A lifelong Beatles fan, Delp also played with the tribute band Beatle Juice.

Delp was cremated Wednesday, police said. A private funeral was held earlier this week.

Source: Boston Globe