■ The second-degree. mUrdert trial-of'a man' accused' ofi * • i •,! shooting a bar lender to death last Oct’. 7 recessed .today because district judges bad Id file in Santa Pe for( rcnornin a* tJoit :tb olfibe in the May primary.David. Tapia, 20, of 514 Coal SW 5s being tried in the. death of Tony Pradb'Chapa, a bartender at the Elbow Room Bar; 310 Second'SW.’.-/ :■• ' • . ‘I.■State -witnesses yesterday included Michael Dawson, 21, oi 300. Second SW, who-testified .he .was in the bar a$ the time of. the shooting and saw Tapia pull a pistol from his trousers' pocket, cock the weapon, aim it at the victim, and fire. • . /Mr. Dawson .also testified that Tapia'tried three times to shake hands with Mr. Chapa, in an • apparent attempt to apologize for a quarrel the two had had in the bar. about 10 days before the falal shooting.Special ■ Agent ' Robert M Zimmers of the FBI laboratory in Washington, D.C., identified a weapon introduced as evidence as the one which killed Chapa. Mr, • Zimmers made the identification on the basis oF microscopic comparison of- the death slug with other bullets fired through the .22 - caliber German revolver found by police under the Lead Avenue overpass after the shooting.