Complex sentence: Bauman also determined that Bloom, who was noted to have "dabbled in oil painting", painted over the original portrait, forged Carpenter's name and created the fake affidavit.
Split into simpler sentences: Bauman also determined that Bloom, who was noted to have "dabbled in oil painting", had likely altered the portrait himself. Bauman believed Bloom painted over the original portrait, forged Carpenter's name and created the fake affidavit.