front of a church last year, but as cnn's brian todd finds out, some experts are skeptical of that report. >> reporter: it was one of the most disturbing scenes in a summer full of them. june 1st, 2020. using tear gas, rubber bullets and batons law enforcement officers pushed back protesters and journalists, clearing them from lafayette park just in front of the white house. now a jarring new report on that incident, the interior department's inspector general says the park police did not clear lafayette park for then president trump's trip to st. john's church, but did it to allow a contractor to install a security fence around the white house. >> we did not clear the park for a photo op. there is 100% zocor lags between our operation and the president's visit to the church. >> reporter: but the report says investigators did not talk to then attorney general william barr who has been accused of being behind the effort to clear