Frisella Neilson, APC on First Avenue in downtown San Diego's Bankers Hill concentrates exclusively on estate planning, trust litigation, probate administration, and elder law. Irrevocable trust funding and generation-skipping transfer tax structuring require coordination with accounting firms like Paragon Accountants to ensure IRS Form 706 estate tax compliance. The trust litigation division handles contested will actions, breach-of-fiduciary-duty claims against trustees, heirship petitions, and financial elder abuse suits under California Probate Code Sections 850 and 859. Conservatorship and guardianship petitions filed in San Diego Superior Court address both estate management and personal-care decisions for incapacitated adults, including Lanterman-Petris-Short Act proceedings. Estate plans involving high-value real property and investment portfolios require asset-allocation coordination with wealth managers like Archipelago Wealth Management to align trust distribution schedules with tax-efficient liquidation strategies. Highest-complexity matters include multi-beneficiary trust contests requiring forensic handwriting analysis of holographic wills and Probate Code Section 21380 undue-influence actions involving fiduciary accounting reconstructions tracing distributions across 10-to-30-year trust administration periods.