I found a blurb about Ada Assiter's death at the bottom of the front page of the Pittsburgh Press of Mar. 24, 1920. The newspaper is accessible through the Google News Archive. It is no longer maintained by Google, but it is still searchable. Navigation on a particular page, however, can be a problem.
Right click on this link and open it in a new tab to see the newspaper:
https://news.google.com/newspapers?nid=djft3U1LymYC&dat=19200323&printsec=frontpage&hl=enThe item about Ada Assiter is at the bottom left of the front page. The best way to navigate, if you can read the headline at the bottom of the page, is by clicking on it. Otherwise, just click on any headline on the front page and then use the arrow keys to go down and left.
Though not over far from the city of Pittsburgh, Leechburg in 1922 was small and rural. Details of local news would have been covered by newspapers of nearby towns. The only other relevant newspaper that I found in the Google News Archive was from Greensburg, a larger town about 20 miles to the southeast. A check of the Greensburg Tribune editions for a few days after March 22, 1922 turned up nothing.
Regards,
John