MATTESON MAN IS HELDBelieve 15 Robberies Are Solved in Four Cities• »A widespread series of daring armed robberies — including two in Chicago Heights was.-believed to have been solved with the apprehension of a Matteson manand two Chicago suspects, all ofwhom have served time in Illinois prisons.The Matteson resident is Walter Mancino, 32, whp was captured.when he tried to slip through acordon of police which- suddenly surrounded his'home at 5:30 a, m.Tuesday;The Chicagoans, two brothers who are said to have been cellmates of Mancino, are Jerome and Wilbur Williams, 35 and- 33 .yearsold, respectively! A' fourth * man, Augie Vendetti, 18, of 44 WestTwenty-third street, said by policeto be a pal of Mancino, also is in police custody, charged with a Kankakee robbery. . *