Supposedly, it was a civilian who found him hiding in a boat in his backyard.
After the police lifted the ban on "sheltering in place", a homeowner went into his backyard, and saw blood on his boat. He lifted the tarp, and saw him in his boat. He ran back into the house and called police. The police sent a helicopter with infrared to hover over the house, and detected his body heat.
He may have planned his escape... but I guess he forgot to bring a black tarp to disguise his body heat sig. lol