De­tec­tives prob­ing the kid­nap­ping of Chi­nese na­tion­al Xue Hua Shan said they are still work­ing on all leads.Shan, 31, was re­port­ed ab­duct­ed out­side her home on Sev­enth Street, Barataria, on April 14.A $4 mil­lion ran­som de­mand had been made for her safe re­lease.Shan is the own­er of Hap­py Gar­dens Restau­rant, St He­le­na Main Road.The po­lice have been con­duct­ing in­ves­ti­ga­tions in Barataria, Blan­chisseuse, Port-of-Spain and en­vi­rons.An­tho­ny Chin, own­er of the Eller­slie Plaza's Chi­na Palace Restau­rant, was a sus­pect in Shan's kid­nap­ping, po­lice said.Chin, 61, of Hills­bor­ough, Mar­aval, was killed last month out­side his restau­rant.