This guy is named in the UK Daily Mail article:
Adam Johnson - The stay-at-home dad who stole Pelosi’s lectern
The looter who smiled for a photo as he made off with a lectern has been identified as Adam Johnson - a psychology graduate turned furniture maker from Bradenton, Florida.
He is a stay-at-home dad to five children; his wife is a doctor, according to The Bradenton Herald. He has previously faced possession of marijuana and violation of probation charges, the paper reports.
Link leads to
https://www.bradenton.com/news/politics-government/article248333850.html
Pity that the UK Daily Mail wasn't this diligent in their reporting of hundreds of BLM and Antifa riots all last summer.