He has no clue how in the world they got there
bed bugs live in any articles of furniture, clothing, or bedding, so they or their eggs may be present in used furniture or clothing. they spread by crawling and may contaminate multiple rooms in a home or even multiple dwellings in apartment buildings. they may also be present in boxes, suitcases, or other goods that are moved from residence to residence or from a hotel to home. bed bugs can live on clothing from infested homes and may be spread by a person unknowingly wearing infested clothing.
youll have to find another source for any further information. i have a weak spot for bed bugs. i like to pretend they dont exist