Vetters Animal Hospital in Raymond, Wash., confirmed that it received a handwritten note from Harris-Moore on May 30 along with $100 cash to be used for the animals.
The note said, "Drove by, had some extra cash. Please use this money for the care of the animals. - Colton Harris-Moore (AKA: "The Barefoot Bandit") Camano Island, WA.
Police checked the note for fingerprints - and came up with a match for Harris-Moore.
Two days later there were a string of crimes along the Washington-Oregon border about 55 miles south of Raymond. And one lawman told KOMO News this latest crime spree has Harris-Moore's signature all over it.
It began in southern Washington, in the tiny coastal town of Ilwaco, where a $450,000 yacht was snatched out of the city's marina on June 1 and then motored south to Astoria, Ore.
That same day in Astoria, detectives believe someone tried to break into a Cessna - similar to four other planes police say the 19-year-old stole and crash-landed.
Two miles away in Warrenton, a rental car was swiped and then dumped 130 miles south in farmland in Dayton. Police are checking for prints.
Just last month - police think the elusive teen stole boats in San Juan Islands and may have dumped a boat near Camano Island where his mother lives.
Harris-Moore, also known as the "Barefoot Bandit," is suspected of stealing property worth as much as $1.5 million, and has been on the run since he escaped from a Renton group home in April 2008.
Since then he has been a thorn in the side of police, taunting investigators with his brazen crimes.
Each time police have gotten close, Harris-Moore has managed to disappear into the woods without a trace.
Police believe he has broken into dozens of homes on islands around Puget Sound, and stolen planes, luxury cars and boats in five Washington counties, Idaho and Canada.
But his mother insists he's being targeted. She is raising money for his defense - and insists he's being blamed for crimes he didn't commit.