Who was Matt Lambert? DC gym shooter was a wealthy doctor who was fighting with the management of his $1.1M penthouse over black mold

The DC shooter who opened fire at his apartment gym and them shot himself was not a deranged migrant but a wealthy emergency room doctor.

According to reports, Dr Matt Lambert has been posting on social media on the infestation of black mold in his $1.1 million painthouse and his "manifesto" posted shortly before he opened fire was also about a suspected microbial growth.“My manifesto is an engineering report,” an X account linked to Lambert tweeted Thursday morning.

The X account (ofmiceand mold) was full of his posts on molds and other grievances related to his apartment.Last year, Lambert had sued Metropole Condominium Association aleeging that repairs to the building led to mold festering in his home as the building was scaffolded.“Two years of living in luxury (and the start of 6 months with no shower, dryer, HVAC, and cooking),” an X account linked to Lambert posted Wednesday, along with pictures showing renovations in the Logan Circle unit.New York Post reported that Dr Lambert lived on the 7th floor of 1515 15th St NW.